Standard Fixed Output LDO Regulators with Shutdown Switch

Transcription

1 Standard LDO Regulators Standard Fixed Output LDO Regulators BA DD Series, BA CC Series Standard Fixed Output LDO Regulators with Shutdown Switch BA DDW and,ba CCW Series o.ect Description Standard Fixed Output LDO Regulators are low-saturation regulators, available for output s up to A / A. ROHM has a wide output voltage range and package lineup with and without shutdown switches. This IC has a built-in over-current protection circuit that prevents the destruction of the IC due to output short circuits, a thermal shut-down circuit that protects the IC from damage due to overloading and an over-voltage protection circuit that protects the IC from surges generated in the power supply line of the IC. Features ) Maximum output current : A (BA DD),A(BA CC) ) ±% highly accurate output voltage (BA DD) ) Low saturation with PP output ) Built-in over-current protection circuit that prevents the destruction of the IC due to output short circuits ) Built-in thermal shutdown circuit for protecting the IC from damage due to overloading 6) Built-in over- voltage protection circuit that prevents the destruction of the IC due to power supply surges 7) TOFP and HRP packaging (BA DD),TOFP and TO packaging(ba CC) Applications Used in DSP power supplies for DVD and CD players, FPDs, televisions, personal computers or any other consumer device ROHM Co., Ltd. All rights reserved. /. - Rev.C

2 BA DDT Series,BA CCT Series,BA CCFP Series BA DDWT Series,BA DDHFP Series,BA CCWT Series,BA CCWFP Series Line up matrix A BA CC Series Part umber Package BA CCWT - - TOFP- BA CCWFP TO- BA CCT TOFP- BA CCFP TO- A BA DD Series 品名 パッケージ BA DDWT TOFP- BA DDWHFP HRP BA DDT TOFP- Part umber: BA CC Part umber: BA DD a b c a b c Symbol Details Symbol Details a b c Output Voltage Designation Output Voltage Designation Output Voltage Output Voltage Output Voltage Output Voltage (V) (V) (V) (V).V(Typ.) 8 8.V(Typ.).V(Typ.).V(Typ.).V(Typ.) 9 9.V(Typ.) a 8.8V(Typ.) 9 9.V(Typ.).V(Typ.) J.V(Typ.) V(Typ.) J.V(Typ.) 6 6.V(Typ.) J.V(Typ.).V(Typ.) J6 6.V(Typ.) 7 7.V(Typ.) J.V(Typ.).V(Typ.) Switch: With W :Shutdown switch included Without W :Shutdown switch not included Package T : TOFP-,TOFP- FP : TO-,TO- Absolute Maximum Ratings(Ta= ) Parameter Symbol Ratings Unit Input Power Supply Voltage * V CC -.~+ V (HRP) Power Dissipation * Pd (TO-) (TO-) (TOFP-,) mw Operating Temperature Range Topr -~+ Ambient Storage Temperature Tstg -~+ Junction Temperature Tj MAX. + Output Control Terminal Voltage * Vctl -.~+Vcc V Voltage Applied to the Tip * VCC peak + V b c Switch: With W :Shutdown switch included Without W :Shutdown switch not included Package T : TOFP-,TOFP- HFP: HRP * Must not exceed Pd * HRP : In cases in which Ta when a 7mm 7mm.6mm glass epoxy board is used, the power is reduced by 8. mw/. TOFP- : In cases in which Ta when a 7mm 7mm.6mm glass epoxy board is used, the power is reduced by 9.6 mw/. TOFP- : In cases in which Ta when a 7mm 7mm.6mm glass epoxy board is used, the power is reduced by. mw/. TOFP- : o heat sink. When Ta, the power is reduced by 6 mw/. * Only for models with shutdown switches. * Applied voltage : msec or less (tr msec) tr msec V V V MAXmsec (Voltage Supply more than V) ROHM Co., Ltd. All rights reserved. /. - Rev.C

3 BA DDT Series,BA CCT Series,BA CCFP Series BA DDWT Series,BA DDHFP Series,BA CCWT Series,BA CCWFP Series Recommended Operating Range (Ta= ) Ratings Parameter Symbol Unit Min. Typ. Max. Input BA CC.. V PowerSupply V CC Voltage BA DD.. V BA CC A Output Current Io BA DD A Output Control Terminal Voltage Vctl V CC V Electrical Characteristics(ABRIDGED) BA CC Series (unless specified otherwise, Ta=, VCTL=.V(only with switch), Io=mA,and Vcc= VccD * ) Limits Parameter Symbol Unit Conditions Min. Typ. Max. Output Voltage Vo Vo.98 Vo Vo. V Refer to the lineup for Vo Circuit Current at Shutdown Isd - µa VCTL=V Minimum I/O Difference ΔVd -.. V Vcc=.9 Vo Output Current Capacity Io. - - A Input Stability Reg.I - mv Vcc= (Vo+)V V Load Stability Reg.L - mv Io=mA A Output Voltage *6 Tcvo - ±. - %/ Io=mA,Tj=~ Temperature Coefficient BADD series (unless specified otherwise, Ta=, VCTL=V(only with switch), Io=mA,and Vcc=VccD *7 ) Limits Parameter Symbol Unit Conditions Min. Typ. Max. Output Voltage Vo Vo.99 Vo Vo. V Io=mA Circuit Current at Shutdown Isd - µa VCTL=V Minimum I/O Difference ΔVd -..7 V Vcc=.9 Vo, Io=A Output Current Capacity Io. - - A Input Stability Reg.I - mv Vcc= VccD *7 V, Io=mA Load Stability Reg.L - mv Io=mA A Output Voltage *6 Tcvo - ±. - %/ Io=mA,Tj=~ Temperature Coefficient * Vo=.V : Vcc= 8.V, Vo=.V : Vcc=8.V, Vo=.V : Vcc=.V, Vo=6.V : Vcc=.V, Vo=7.V : Vcc=.V, Vo=8.V : Vcc=.V, Vo=9.V : Vcc=.V, Vo=.V : Vcc=.V, Vo=.V : Vcc=7.V, Vo=.V : Vcc=.V *6 Design guarantee (% shipping inspection not performed) *7 Vo=.V,.8V, V,.V : Vcc=.V, Vo=.V,.V : Vcc=7.V, Vo=9.V : Vcc=.V,Vo=V : Vcc=V, Vo=6V : Vcc=8V ROHM Co., Ltd. All rights reserved. /. - Rev.C

4 BA DDT Series,BA CCT Series,BA CCFP Series BA DDWT Series,BA DDHFP Series,BA CCWT Series,BA CCWFP Series Reference Data (Unless specified otherwise, Vcc=8.V, Vo=.V, VCTL=.V, and Io=mA) BA CC (BACCWT). [BACCWT]. [BACCWFP]. [BACCWFP] CIRCUIT CURRET : Icc [ma] Fig. Circuit current Fig. Input Stability Fig. Input Stability (Io=mA) [BACCWT] 6 [BACCWT] 8 [BACCWT] OUTPUT VOLTAGE : V OUT [V].. DROPOUT VOLTAGE : ΔVd [mv] RIPPLE REJECTIO : R.R. [db] OUTPUT CURRET : IO[mA] Fig. Load Stability 6 8 OUTPUT CURRET : IO [ma] Fig. Input/Output Voltage Difference IOUT(V=A) FREQUECY : f [Hz] Fig.6 Ripple Rejection Characteristics (Io=mA). [BACCWT] AMBIET TEMPERATURE : Ta [ ] Fig.7 Output Voltage Temperature Characteristics CIRCUIT CURRET : Icc [ma] [BACCWT] 6 8 OUTPUT CURRET:Io(mA) Fig.8 Circuit Current by load Level (IOUT=mA A) CIRCUIT CURRET : Ictl [µa] [BACCWT] COTROL VOLTAGE:Vctl(V) Fig.9 CTL Voltage vs. CTL Current 8 [BACCWFP]. [BACCWFP]. [BACCWFP] COTROL VOLTAGE : Vctl [V] Fig. CTL Voltage vs. Output Voltage Fig. Overvoltage Operating Characteristics (Io=mA) AMBIET TEMPERATURE : Ta [ ] Fig. Thermal Shutdown Circuit Characteristics ROHM Co., Ltd. All rights reserved. /. - Rev.C

5 BA DDT Series,BA CCT Series,BA CCFP Series BA DDWT Series,BA DDHFP Series,BA CCWT Series,BA CCWFP Series Reference Data (Unless specified otherwise, Vcc=7.V, Vo=.V, VCTL=.V, and Io=mA) BA DD (BADDWT) CIRCUIT CURRET : Icc [ma] 6 [BADDWT] Fig. Circuit Current [BADDWT] Fig. Input Stability [BADDWT] Fig. Input Stability (Io=A) OUTPUT VOLTAGE : V OUT [V] [BADDWT] OUTPUT CURRET : IOUT [A] Fig.6 Load Stability DROPOUT VOLTAGE : VDRP[mV] [BADDWT] OUTPUT CURRET : IOUT [A] Fig.7 Input/Output Voltage Difference RIPPLE REJECTIO : R.R. [db] 6 [BADDWT] FREQUECY : f [Hz] Fig.8 Ripple Rejection Characteristics [BADDWT] AMBIETTEMPERATURE [ ] Fig.9 Temperature Characteristics CIRCUIT CURRET (ma) [BADDWT]..... OUTPUT CURRET : IOUT [A] Fig. Circuit Current by Load Level COTROL CURRET:ICTL(µA) [BADDWT] COTROL VOLYAGE:Vctl(V) Fig. CTL Voltage vs. CTL Current 8 [BADDWT] 8 [BADDWT] 8 [BADDWT] OUTPUT VOLTAGE : VOUT[V] COTROL VOLTAGE : VCTL [V] AMBIET TEMPERATURE : Ta [ ] Fig. CTL Voltage vs. Output Voltage Fig. Overvoltage Operating Fig. Thermal Shutdown Circuit Characteristics ROHM Co., Ltd. All rights reserved. /. - Rev.C

6 BA DDT Series,BA CCT Series,BA CCFP Series BA DDWT Series,BA DDHFP Series,BA CCWT Series,BA CCWFP Series Block Diagrams BA CCWFP/ BA DDWHFP/ BA CCWT/ BA DDWT Vref Fin CTL Vcc.C. OUT.C. (TO-) (TOFP-,HRP) Fig. Driver OVP TSD OCP (TO- HRP) Vcc R R TOP VIEW FI TO- TOP VIEW TOFP- HRP PI o. Pin ame Function CTL Output voltage O/OFF control Vcc Power supply voltage input.c/ Unconnected terminal/* OUT Voltage output.c Unconnected terminal Fin * * TO-=.C.,TOFP-,HRP= * TO-,HRP only BA CCT/ BA CCFP/ BA DDT Vref Fin (TO-) Driver OVP TSD OCP Vcc R R TOP VIEW FI TO- TOP VIEW TOFP- PI o. Pin ame Function Vcc Power supply voltage input.c/ Unconnected terminal/* OUT Voltage output Fin * * TO-=.C.,TO-FP= * TO- only Vcc.C. OUT (TO-) (TOFP-) Fig.6 Input / Output Equivalent Circuit Diagrams < BA DD Series > < BA CC Series > Vcc Vcc Vcc kω OUT kω CTL 9kΩ kω kω R CTL kω kω R OUT R R Fig.7 Fig.8 ROHM Co., Ltd. All rights reserved. 6/. - Rev.C

7 BA DDT Series,BA CCT Series,BA CCFP Series BA DDWT Series,BA DDHFP Series,BA CCWT Series,BA CCWFP Series Thermal Design HRP- TOFP- TO- Power Dissipation:Pd(W) Board size : mm (board contains a thermal via) Board front copper foil area :.. mm -layer board (back surface copper foil area : mm ) -layer board (back surface copper foil area :7 7 mm ) -layer board (back surface copper foil area :7 7 mm ) 7.W.W Power Dissipation:Pd(W) When using a maximum heat sick : θj-c=6.( /W) When using an IC alone : θj-6=6( /W) (). Power Dissipation:Pd(W) Mounted on a Rohm standard board Board size : mm Copper foil area :7 7 mm TO-θja=96.( /W)..W ().. 7 Ambient temperature:ta( ) 7 Ambient temperature:ta( ). 7 Ambient temperature:ta( ) Fig.9 Fig. Fig. When using at temperatures over Ta=, please refer to the heat reducing characteristics shown in Fig.9 through. The IC characteristics are closely related to the temperature at which the IC is used and if the temperature exceeds the maximum junction temperature TjMAX., the elements may be damaged or destroyed. From the standpoints of instantaneous destruction and long-term operating reliability, it is necessary give sufficient consideration to IC heat. In order to protect the IC from thermal damage, it is necessary to operate it at temperatures lower than the maximum junction temperature TjMAX of the IC. Fig. shows the acceptable loss and heat reducing characteristics of the TOFP package The portion shown by the diagonal line is the acceptable loss range that can be used with the IC alone. Even when the ambient temperature Ta is a normal temperature ( ), the chip (junction) temperature Tj may be quite high so please operate the IC at temperatures less than the acceptable loss Pd. The method of calculating the power consumption Pc(W) is as follows. Pc = (Vcc-Vo) Io + Vcc Icca Acceptable loss Pd Pc Vcc: Input voltage Vo: Output voltage Io: Load current Vcca: Circuit current Solving this for load current IO in order to operate within the acceptable loss: Io Pd Vcc Icca Vcc-Vo (Please refer to Figs.8 and for Icca.) It is then possible to find the maximum load current IoMAX with respect to the applied voltage Vcc at the time of thermal design. Calculation Example Example ) When Ta=8, Vcc=8.V, Vo=.V, BADDWT.-8. Icca Io With the IC alone : θja=6 /W -6mW/ Io ma (Icca : ma) =mw 8 =mw Please refer to the above information and keep thermal designs within the scope of acceptable loss for all operating temperature ranges. The power consumption Pc of the IC when there is a short circuit (short between Vo and ) is : Pc=Vcc (Icca+Ishort) *Ishort : Short circuit current ROHM Co., Ltd. All rights reserved. 7/. - Rev.C

8 BA DDT Series,BA CCT Series,BA CCFP Series BA DDWT Series,BA DDHFP Series,BA CCWT Series,BA CCWFP Series Peripheral Circuit Considerations Vcc Terminal Please attach a capacitor (greater than.µf) between the Vcc and. The capacitance values will differ depending on the application, so please take this into account when configuring the terminal. Terminal Please be sure to keep the set ground and IC ground at the same potential level so that a potential difference does not arise between them. If a potential difference arises between the set ground and the IC ground, the preset voltage will not be outputted, causing the system to become unstable. Therefore, please reduce the impedance by making the ground patterns as wide as possible and by reducing the distance between the set ground and the IC ground as much as possible. CTL Terminal The CTL terminal is turned O at.v and higher and OFF at.8v and lower within the operating power supply voltage range. The power supply and the CTL terminal may be started up and shut down in any order without problems. Vo Terminal IC OUT μf EFFECTIVE SERIES RESISTACE:ESR [Ω] Unstable operating region Stable operating region Unstable operating region. 6 8 OUTPUT CURRET:lo(mA) EFFECTIVE SERIES RESISTACE:ESR [Ω]. Unstable operating region Stable operating region Unstable operating region OUTPUT CURRET:lo(mA) Fig. Output Equivalent Circuit Fig. ESR-Io Characteristics Fig. ESR vs Io Characteristics (BA CC) (B A DD) Please attach an anti-oscillation capacitor between Vcc and. The capacitance of the capacitor may significantly change due to factors such as temperature changes, making it impossible to completely stop oscillations. Please use a tantalum capacitor or aluminum electrolysis capacitor with favorable characteristics and small internal series resistance (ESR) even at low temperatures. The output fluctuates regardless of whether the ESR is large or small. Please use the IC within the stable operating region while referring to the ESR characteristics reference data shown in Figs. through. In applications where there are sudden load fluctuations, the use of a capacitor with large capacitance is recommended. ROHM Co., Ltd. All rights reserved. 8/. - Rev.C

9 BA DDT Series,BA CCT Series,BA CCFP Series BA DDWT Series,BA DDHFP Series,BA CCWT Series,BA CCWFP Series Other Points of Caution ) Protection Circuits Over-current Protection Circuit A built-in over-current protection circuit corresponding to the current capacity prevents the destruction of the IC when there are load shorts. This protection circuit is a 7 -shaped current control circuit that is designed such that the current is restricted and does not latch even when a large current momentarily flows through the system with a high-capacitance capacitor. However, while this protection circuit is effective for the prevention of destruction due to unexpected accidents, it is not suitable for continuous operation or transient use. Please be aware when creating thermal designs that the overcurrent protection circuit has negative current capacity characteristics with regard to temperature (Refer to Figs. and 6). Thermal Shutdown Circuit (Thermal Protection) This system has a built-in temperature protection circuit for the purpose of protecting the IC from thermal damage. As shown above, this must be used within the range of acceptable loss, but if the acceptable loss happens to be continuously exceeded, the chip temperature Tj increases, causing the temperature protection circuit to operate. When the thermal shutdown circuit operates, the operation of the circuit is suspended. The circuit resumes operation immediately after the chip temperature Tj decreases, so the output repeats the O and OFF states (Please refer to Figs. and for the temperatures at which the temperature protection circuit operates). There are cases in which the IC is destroyed due to thermal runaway when it is left in the overloaded state. Be sure to avoid leaving the IC in the overloaded state. Reverse Current In order to prevent the destruction of the IC when a reverse current flows through the IC, it is recommended that a diode be placed between the Vcc and Vo and a pathway be created so that the current can escape (Refer to Fig.). Reverse current Vcc CTL OUT Fig. 6:Bypass diode ) This IC is bipolar IC that has a P-board (substrate) and P+ isolation layer between each devise, as shown in Fig.6. A P- junction is formed between this P-layer and the -layer of each device, and the P- junction operates as a parasitic diode when the electric potential relationship is > Terminal A, > Terminal B, while it operates as a parasitic transistor when the electric potential relationship is Terminal B > Terminal A. Parasitic devices are structurally inevitable in the IC. The operation of parasitic devices induces mutual interference between circuits, causing malfunctions and eventually the destruction of the IC. It is necessary to be careful not to use the IC in ways that would cause parasitic elements to operate. For example, applying a voltage that is lower than the (P-board) to the input terminal. (Pin B) C P+ Parasitic element or transistor Transistor (P) B E P P P+ (Pin A) P+ P Resistor P P+ Parasitic element (Pin B) (Pin A) B C E Parasitic element or transistor Parasitic element Fig. 7: Example of the basic structure of a bipolar IC ROHM Co., Ltd. All rights reserved. 9/. - Rev.C

10 .8±. BA DDT Series,BA CCT Series,BA CCFP Series BA DDWT Series,BA DDHFP Series,BA CCWT Series,BA CCWFP Series Ordering part number B A C C W H F P - T R Part o. Output voltage Series CC : A DD : A Shutdown switch W : Includes switch Package HFP :HRP FP :TO- TO- T :TOFP- TOFP- Packaging and forming specification TR: Embossed tape and reel (HRP) E: Embossed tape and reel (TO-, TO-) one : Container Tube V :Foaming(V only) HRP 8.±..7±. 9.9±. (MAX 9.7 include BURR) 8.8 ±. (6.) (7.9).9±..±..±. <Tape and Reel information> Tape Quantity Direction of feed Embossed carrier tape pcs TR The direction is the pin of product is at the upper right when you hold ( reel on the left hand and you pull out the tape on the right hand ) pin.7.8±..7.7±..8 S S (Unit : mm) Reel Direction of feed Order quantity needs to be multiple of the minimum quantity. TO- <Tape and Reel information>.±..±. 6.± FI C..±..±. 9.±. Tape Quantity Direction of feed Embossed carrier tape pcs E The direction is the pin of product is at the lower left when you hold reel on the left hand and you pull out the tape on the right hand ( ) ±..±..±..±. (Unit : mm) Reel pin Direction of feed Order quantity needs to be multiple of the minimum quantity. TO- <Tape and Reel information>.±..±. 6.±..± FI C..±. 9.±. Tape Quantity Direction of feed Embossed carrier tape pcs E The direction is the pin of product is at the lower left when you hold reel on the left hand and you pull out the tape on the right hand ( ).8..±...7.±. (Unit : mm) Reel pin Direction of feed Order quantity needs to be multiple of the minimum quantity. ROHM Co., Ltd. All rights reserved. /. - Rev.C

11 BA DDT Series,BA CCT Series,BA CCFP Series BA DDWT Series,BA DDHFP Series,BA CCWT Series,BA CCWFP Series TOFP-.8± φ.± <Tape and Reel information> Container Tube Quantity pcs Direction of feed Direction of products is fixed in a container tube ±. Min..±. 8.±...8 ±. ± ±. (Unit : mm) Order quantity needs to be multiple of the minimum quantity. TOFP-.8± φ.± <Tape and Reel information> Container Tube Quantity pcs Direction of feed Direction of products is fixed in a container tube Min ±. 8.± ±..8 (Unit : mm) Order quantity needs to be multiple of the minimum quantity. ROHM Co., Ltd. All rights reserved. /. - Rev.C

12 otice otes o copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. The Products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices). The Products specified in this document are not designed to be radiation tolerant. While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons. Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us. ROHM Customer Support System ROHM Co., Ltd. All rights reserved. RA