NJW4196. Internal 3.5A MOSFET Switching Regulator IC for Buck Converter

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1 Internal.A MOSFET Switching Regulator IC for Buck Converter GENERAL DESCRIPTION The NJW96 is a buck converter with 0V/.A MOSFET. The transient response when a supply voltage rises from a reduced voltage is improved than conventional current mode products, therefore the NJW96 provides stable regulation characteristic even if application which an operating voltage fluctuates. External Clock Synchronization function synchronizes oscillating frequency with external clock input. Also, it has a soft start function, an external clock synchronization, an over current protection and a thermal shutdown circuit. It is suitable for supplying power to a Car Accessory, Office Automation Equipment, Industrial Instrument and so on. PACKAGE OUTLINE NJW96GM FEATURES Fast supply voltage transient response from a reduced voltage External Clock Synchronization Wide Operating Voltage Range.V to 0V Switching Current A min. Oscillating Frequency A ver. Fixed 0kHz typ. J ver. Adjustable TBD(00kHz) to TBD PWM Control Maximum Duty Cycle 00% Correspond to Ceramic Capacitor (MLCC) Adjustable Soft Start Function UVLO (Under Voltage Lockout) Over Current Protection (Hiccup type) Thermal Shutdown Protection Power Good Function Standby Function Package Outline NJW96GM : HSOP8 PRODUCT CLASSIFICATION Part Number NJW96GM-A NJW96GM-J (U.D.) Version A J Oscillating Frequency Fixed 0kHz typ. Adjustable TBD(00kHz) to TBD Operating Temperature Range General Spec. -0 C to +2 C General Spec. -0 C to +2 C Ver

2 PIN CONFIGURATION SW 8 V + SW 8 V + GND 2 7 N.C. GND 2 7 EN/SYNC SS 6 EN/SYNC SS 6 PG FB PG FB RT Exposed PAD on backside connect to GND NJW96GM-A Exposed PAD on backside connect to GND NJW96GM-J (U.D.) PIN DESCRIPTIONS PIN NUMBER PIN NAME J version FUNCTION A version (U.D.) SW Switch Output pin of Power MOSFET GND 2 2 GND pin SS Soft Start timer setting pin. Soft start time is set by an external capacitor. FB Output Voltage Detecting pin Connects output voltage through the resistor divider tap to this pin in order to voltage of the FB pin become V. RT Oscillating Frequency Setting pin with an external Timing Resistor. Oscillating Frequency should set between TBD(00kHz) and TBD. (Only J version) PG 6 Power Good pin. An open drain output that goes high impedance when the FB pin voltage is stable around %. EN/SYNC 6 7 Standby Control pin The EN/SYNC pin internally pulls down with 00k. Normal Operation at the time of High Level. Standby Mode at the time of Low Level or OPEN. Moreover, it operates by inputting clock signal at the oscillatory frequency that synchronized with the input signal. N.C. 7 Non Connection (Only A version) V Power Supply pin for Power Line Exposed PAD Connect to GND Ver.20-0-

3 BLOCK DIAGRAM V + SLOPE COMP. CURRENT SENSE UVLO OCP EN/SYNC High: ON Low: OFF(Standby) (J ver. only) RT Enable (Standby) SYNC OSC S Q R Buffer TSD SW FB Buffer PWM GND PG Power Good Control Logic Soft Start Vref PEAK HOLD SS Ver

4 ABSOLUTE MAXIMUM RATINGS (Ta=2 C) PARAMETER SYMBOL MAXIMUM RATINGS UNIT Supply Voltage V + -0.~+ V V + - SW pin Voltage V V-SW + V FB pin Voltage V FB -0.~+6 V PG pin Voltage V PG -0.~+6 V EN/SYNC pin Voltage V EN/SYNC -0.~+ V Power Dissipation P D HSOP8 860 (*) 2,900 (*2) mw Junction Temperature Range T j -0 to +0 C Operating Temperature Range T opr -0 to +2 C Storage Temperature Range T stg -0 to +0 C (*): Mounted on glass epoxy board. ( mm:based on EIA/JDEC standard, 2Layers) (*2): Mounted on glass epoxy board. ( mm:based on EIA/JDEC standard, Layers) (For Layers: Applying mm inner Cu area and a thermal via hall to a board based on JEDEC standard JESD-) Depending on conditions of the application, NJW96 may not apply a max output current of it by a limit of the power consumption. RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL MIN. TYP. MAX. UNIT Supply Voltage V +. 0 V Power Good pin Voltage V PG 0. V Timing Resistor (*) R T TBD - TBD k Oscillating Frequency (*) f OSC TBD (00) TBD khz External Clock Input Range (*): Apply only the J version. A version J version (U.D.) f SYNC fosc 600. fosc khz - - Ver.20-0-

5 ELECTRICAL CHARACTERISTICS (Unless otherwise noted, V + =V EN./SYNC =2V, Ta=2 C, J version: R T =TBD k ) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Under Voltage Lockout Block ON Threshold Voltage V T_ON V + = L H.0.2. V OFF Threshold Voltage V T_OFF V + = H L.0.. V Hysteresis Voltage V HYS mv Soft Start Block Charge Current I CHG..0. A Oscillator Block Oscillating Frequency (*) f OSC_A khz Oscillating Frequency (*) f OSC_J R T =TBDk khz Oscillating Frequency 2 (*) f OSC2_J R T =TBDk TBD TBD TBD khz Oscillating Frequency deviation (Supply voltage) f DV V + =.V to 0V % Oscillating Frequency deviation (Temperature) f DT Ta=-0 C to +8 C % (*): A version (*): J version (U.D.) Buffer Block Reference Voltage V B -.0% +.0% V Threshold Voltage V TH I SW =A -2.0% +2.0% V Input Bias Current I B A PWM Comparate Block Maximum Duty Cycle M AX D UTY V FB =0.9V 00 % Minimum ON Time t ON-min 2 8 ns OCP Block COOL DOWN Time t COOL 7 ms Output Block Output ON Resistance R ON I SW =A Switching Current Limit I LIM 6. 8 A SW Leak Current I LEAK V EN/SYNC =0V, V + =0V, V SW =0V A Standby Control / Sync Block EN/SYNC pin High Threshold Voltage EN/SYNC pin Low Threshold Voltage Input Bias Current (EN/SYNC pin) V THH_EN/SYNC V EN/SYNC = L H.6 V + V V THL_EN/SYNC V EN/SYNC = H L 0 0. V I EN/SYNC V EN/SYNC =2V 2 0 A Ver

6 ELECTRICAL CHARACTERISTICS (Unless otherwise noted, V + =V EN./SYNC =2V, Ta=2 C, J version: R T =TBD k ) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Power Good Block High Level Detection Voltage V THH_PG Measured at FB pin 0 20 Low Level Detection Voltage V THL_PG Measured at FB pin Hysterisis Region V HYS_PG 2 Power Good ON Resistance R ON_PG I PG =0mA 60 Leak Current at OFF State I LEAK_PG V PG =6V 0. A General Characteristics Quiescent Current I DD R L =no load, V FB =0.9V..2 ma Standby Current I DD_STB V EN/SYNC =0V A THERMAL CHARACTERISTICS PARAMETER SYMBOL VALUE UNIT Junction-to-ambient thermal resistance Junction-to-Top of package characterization parameter ja jt (*6) (*7) 28 (*6) 2 (*7) (*6): Mounted on glass epoxy board. ( mm:based on EIA/JDEC standard, 2Layers) (*7): Mounted on glass epoxy board. ( mm:based on EIA/JDEC standard, Layers) (For Layers: Applying mm inner Cu area and a thermal via hall to a board based on JEDEC standard JESD-) C/W C/W POWER DISSIPATION vs. AMBIENT TEMPERATURE Power Dissipation P D (mw) NJW96GM (HSOP8 Package) Power Dissipation vs. Ambient Temperature (Tj=~0 C) At on layer PC Board (*7) At on 2 layer PC Board (*6) 0 Ambient Temperature Ta ( C) Ver.20-0-

7 TYPICAL APPLICATIONS V IN L V OUT C IN SBD C OUT V + SW C FB R2 EN/SYNC High: ON Low: OFF (Standby) EN/ SYNC NJW96 FB Power Good PG SS RT GND R C SS R T C (J ver. only) Ver

8 TYPICAL CHARACTERISTICS (A, J version).0 Reference Voltage vs. Supply Voltage (Ta=2ºC) Quiescent Current vs. Supply Voltage (R L =no load, V FB =0.9V, Ta=2ºC) Reference Voltage :V B (V) Quiescent Current :I DD (ma) Supply Volatage :V + (V) Supply Volatage :V + (V).0 Reference Voltage vs. Temperature (V + =2V).02 Threshold Voltage vs. Temperature (V + =2V, I SW =A) Reference Voltage :V B (V) Threshold Voltage :V TH (V) Charge Current :I CHG (μa) Charge Current vs. Temperature (V + =2V). Minimum ON Time :t on_min (ns) Minimum ON Time vs. Temperature (V + =2V) Ver.20-0-

9 TYPICAL CHARACTERISTICS (A, J version) Output ON Resistance :Ron (Ω) Output ON Resistance vs. Temperature (I SW =A) V + =V V + =0V V + =2V 0 Switching Current Limit :I LIM (A) Switching Current Limit vs. Temperature V + =0V V + =2V V + =V Threshold Voltage : (V) Under Voltage Lockout Voltage vs. Temperature V T_ON V T_OFF Quiescent Current :I DD (ma) Quiescent Current vs. Temperature (R L =no load, V FB =0.9V) V + =0V, 2V V + =.V 2.2 Standby Current :I DD_STB (μa) Standby Current vs. Temperature (V EN/SYNC =0V) V + =.V V + =0V V + =2V 0 Switching Leak Current :I LEAK (μa) Switching Leak Current vs. Temperature (V + =0V, V EN/SYNC =0V, V SW =0V) 0 Ver

10 TYPICAL CHARACTERISTICS (A version) Oscillating Frequency :f OSC (khz) Oscillating Frequency vs. Supply Voltage (Ta=2ºC) Supply Volatage :V + (V) Oscillating Frequency :f OSC (khz) Oscillating Frequency vs. Temperature (V + =2V) Ver.20-0-

11 MEMO [CAUTION] The specifications on this databook are only given for information, without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. Ver