150mA, Low-Noise LDO Voltage Regulator

Transcription

1 150mA, Low-Noise LDO Voltage Regulator FEATURES Low Noise Output LDO: 40µV RMS Possible 1% Initial Accuracy Very Low Quiecent Current: 70µA Low Dropout Voltage (210mV at 150mA) Current and Thermal Limiting Reverse-Battery Protection Wide Range of Fix Output Voltages:1.2V, 1.5V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V and 5.0V Zero Off-Mode Current Small 5-Pin SOT-23 Pin Compatible to MIC5205/MAX8877 (fixed Options Only) and AS3815 Fixed Output Voltage V OUT BYP Pin SOT V IN GND EN Adjustable Output Voltage V OUT ADJ/BYP Pin SOT APPLICATIONS V IN GND EN PDA Battery Powered Systems Now Available in Lead Free Packaging Cellular Phone Portable Consumer Equipment Cordless Telephones Portable Instrumentation Radio Control Systems Bar Code Scanners Laptop, Palmtop, and Notebook Computers SMPS Post-Regulator DESCRIPTION The is a positive voltage regulator with very low dropout voltage, output noise and ground current (750µA at 100mA). V OUT has a tolerance of less than 1% and is temperature compensated. Fixed output voltages 1.2V, 1.5V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V, and 5.0V and an adjustable version are available in a small 5-pin SOT-23 package. Other key features include zero off-mode current, reverse battery protection, thermal shutdown and current limit. The is an excellent choice for use in batterypowered applications, and where power conservation is desired such as: cellular/ cordless telephones, radio control systems, and portable computers. TYPICAL APPLICATION CIRCUIT V IN 1 5 V OUT + GND µF EN 3 4 BYP (Optn) ENABLE may be tied directly to V IN TOP View Date:12/18/04 150mA, Low Noise LDO Voltage Regulator Copyright 2004 Sipex Corporation 1

2 Thermal Shutdown... Internally Limited Lead Temperature (Soldering, 5 seconds) C Operating Junction Temperature Range C to +125 C Input voltage V to 16V Operating Junction Temperature Range C to +125 C Enable Input Voltage... 0V to V IN SOT-23-5 (θ JA)... See Note 1 ELECTRICAL CHARACTERISTICS T J =25 C, V IN = V OUT + 1V, I L = 100µA, C L = 1µF, and V ENABLE 2.4V. The denotes the specifications which apply over full temperature range -40 C to +85 C, unless otherwise specified. PARAMETER MIN TYP MAX UNITS CONDITIONS Output Voltage Tolerance (V OUT ) %V NOM Output Voltage Temperature Coefficient 57 ppm/ C ABSOLUTE MAXIMUM RATINGS Input Supply Voltage V to +20V Enable Input Voltage V to +20V RECOMMENDED OPERATING CONDITIONS Line Regulation %/V V IN = V OUT + 1V to 16V 0.2 Load Regulation % I L = 0.1mA to 150mA 0.5 Dropout Voltage (See Note 2) mv I L = 100µA (V IN - V O ) mv I L = 50mA mv I L = 100mA mv I L = 150mA 350 Quiescent Current (I GND ) µa V ENABLE 0.4V 5 V ENABLE 0.25V Ground Pin Current µa I L = 100µA (I GND ) I L = 50mA I L = 100mA I L = 150mA 2500 Ripple Rejection (PSRR) 70 db Current Limit (I LIMIT ) ma V OUT = 0V Output Noise (e NO ) 300 µv RMS I L = 10mA, C L = 1µF, C IN = 1µF (10Hz - 100kHz.) 40 µv RMS I L = 10mA, C L = 10µF, C BYP = 1µF,C IN =1µF,(10Hz - 100kHz) Input Voltage Level 0.4 V OFF Logic Low (V IL ) Input Voltage Level 2.0 ON Logic High (V IL ) ENABLE Input Current µa 3 20 V IL 0.4V V IH 2.0V Note 1: The maximum allowable power dissipation is a function of maximum operating junction temperature, T J (max), the junction to ambient thermal resistance, and the ambient, θj A, and the ambient temperature T A. The maximum allowable power dissipation at any ambient temperature is given: P D (max) = (T J (max) - T A )/θj A, exceeding the maximum allowable power limit will result in excessive die temperature; thus, the regulator will go into thermal shutdown. The θj A of the is 220 C/W mounted on a PC board. Note 2: Not applicable to output voltages of less than 2V. Date:12/18/04 150mA, Low Noise LDO Voltage Regulator Copyright 2004 Sipex Corporation 2

3 TYPICAL PERFORMANCE CHARACTERISTICS V Device V IN = 3.2V IGND (ma) IGND (µa) V O = 3.3V I L = 100µA I L (ma) Ground Current vs Load Current Ground Current vs Input Voltage V IN (V) IGND (ma) V Device VOUT (V) V Device I L = 100µA I L (ma) V IN (V) Ground Current vs Load Current in Dropout Output Voltage vs Input Voltage Date:12/18/04 150mA, Low Noise LDO Voltage Regulator Copyright 2004 Sipex Corporation 3

4 TYPICAL PERFORMANCE CHARACTERISTICS V O =3.3V V IN = 3.2V V Device Dropout (mv) VOUT (V) I L (ma) Dropout Voltage vs Load Current I L (ma) Output Voltage vs Load Current V OUT = 3.3V I L = 100µA IGND (µa) 70.0 IGND (µa) V OUT = 3.3V I L = 100mA Temperature ( C) Temperature ( C) Ground Current vs Temperature at I LOAD =100µA Ground Current vs Temperature at I LOAD =100mA Date:12/18/04 150mA, Low Noise LDO Voltage Regulator Copyright 2004 Sipex Corporation 4

5 TYPICAL PERFORMANCE CHARACTERISTICS IGND (ma) V OUT = 3.3V I L = 150mA VOUT (V) V OUT = 3.3V Temperature ( C) Temperature ( C) Ground Current in Dropout vs Temperature Output Voltage vs Temperature VEN, On Threshold (V) V OUT =3.3V C L = 1.0µA I L = 100µA uv RMS Cin = 1uFT, Cout = 1uFT Cin = 1uFT, Cout = 2.2uFT Cin = 1uFT Cout = 10uFT V IN (V) Bypass Cap (pf) ENABLE Voltage, ON threshold vs Input Voltage Output Noise vs. Bypass Capacitor Value Date:12/18/04 150mA, Low Noise LDO Voltage Regulator Copyright 2004 Sipex Corporation 5

6 APPLICATION INFORMATION The requires an output capacitor for device stability. Its value depends upon the application circuit. In general, linear regulator stability decreases with higher output currents. In applications where the is putting out less current, a lower output capacitance may be sufficient. For example, a regulator sourcing only 10mA, requires approximately half the capacitance as the same regulator sourcing 150mA. Bench testing is the best method for determining the proper type and value of the capacitor since the high frequency characteristics of electrolytic capacitors vary widely, depending on type and manufacturer. A high quality 2.2µF aluminum electrolytic capacitor works in most application circuits, but the same stability often can be obtained with a 1µF tantalum electrolytic. With the adjustable version, the minimum value of output capacitance is a function of the output voltage. The value decreases with higher output voltages, since closed loop gain is increased. A 10nF capacitor on BYP pin will significantly reduce output noise but it may be left unconnected if the output noise is not a major concern. The start-up speed is inversely proportional to the size of the BYP capacitor. Applications requiring a slow ramp-up of the output voltage should use a larger C BYP. However, if a rapid turn-on is necessary, the BYP capacitor can be omitted. The s internal reference is available through the BYP pin. The Typical Application Circuit shown on page 1 represents a standard application circuit. The EN (enable) pin is pulled high (>2.0V) to enable the regulator. To disable the regulator, EN < 0.4V. The in Figure 1 illustrates a typical adjustable output voltage configuration. Two resistors (R1 and R2) set the output voltage. The output voltage is calculated using the formula: V OUT = 1.235V x ( 1 + R1/R2) Typical Applications Circuits R2 must be > 10 kω and for best results, R2 should be between 22 kω and 47kΩ. A capacitor placed between adjustable and ground will provide improved noise performance. V IN 1 5 V OUT + GND 2 R1 + EN 3 4 ADJ Hi-ON Lo-OFF BYP (Optn) R2 TOP View Figure 1. Typical Adjustable Output Voltage. Date:12/18/04 150mA, Low Noise LDO Voltage Regulator Copyright 2004 Sipex Corporation 6

7 PACKAGE: 5 PIN SOT-23 D e1 N N/2 +1 E1 E1/2 E/2 E B B SEE VIEW C VIEW A-A 1 2 N/2 e Ø b 5 Pin SOT-23 JEDEC MO-178 (AA) Variation SYMBOL MIN NOM MAX A A A b c D E E1 e e1 L BSC 2.80 BSC 1.60 BSC 0.95 BSC 1.90 BSC L1 L2 Ø 0º 0.60 REF 0.25 BSC 4º 8º ø 5º 10º 15º Gauge Plane L Seating Plane Ø L Ø L1 VIEW C A2 A Seating Plane A1 SIDE VIEW b WITH PLATING c Note: Dimensions in (mm) BASE METAL SECTION B-B Date:12/18/04 150mA, Low Noise LDO Voltage Regulator Copyright 2004 Sipex Corporation 7

8 ORDERING INFORMATION PART NUMBER TOP MARK ACC. OUTPUT VOLTAGE PACKAGE M5... H1WW... 1%... Adj... 5 Pin SOT-23 M5/TR... H1WW... 1%... Adj... 5 Pin SOT-23 M R % V... 5 Pin SOT-23 M5-1.2/TR... R % V... 5 Pin SOT-23 M R % V... 5 Pin SOT-23 M5-1.5/TR... R % V... 5 Pin SOT-23 M R % V... 5 Pin SOT-23 M5-1.8/TR... R % V... 5 Pin SOT-23 M R % V... 5 Pin SOT-23 M5-2.0/TR... R % V... 5 Pin SOT-23 M R % V... 5 Pin SOT-23 M5-2.5/TR... R % V... 5 Pin SOT-23 M R %...2.8V...5 Pin SOT-23 M5-2.8/TR... R %...2.8V...5 Pin SOT-23 M R30...1%...3.0V...5 PIN SOT-23 M5-3.0/TR...R30...1%...3.0V...5 PIN SOT-23 M R % V... 5 Pin SOT-23 M5-3.3/TR... R % V... 5 Pin SOT-23 M R % V... 5 Pin SOT-23 M5-5.0/TR... R % V... 5 Pin SOT-23 Available in lead free packaging. To order add -L suffix to part number. Example: M5-5.0/TR = standard; M5-5.0-L/TR = lead free Note that for top markings on small packages, when the bar is added to indicate lead-free parts, it can be mistaken as a 1 or an I. /TR = Tape and Reel Pack quantity is 2,500 for 5pin SOT-23 Corporation ANALOG EXCELLENCE Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA TEL: (408) FAX: (408) Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Date:12/18/04 150mA, Low Noise LDO Voltage Regulator Copyright 2004 Sipex Corporation 8