NJW4153 Switching Regulator IC for Buck Converter Current Mode Control w/ 40V/1A MOSFET GENERAL DESCRIPTION ■ PACKAGE OUTLINE The NJW4153 is a buck converter with 40V/1A MOSFET. It corresponds to high oscillating frequency, and Low ESR Output Capacitor (MLCC) within wide input range from 4.6V to 40V. Therefore, the NJW4153 can realize downsizing of applications with a few external parts so that adopts current mode control. Also, it has a soft start function, an over current protection and a thermal shutdown circuit. It is suitable for power supply circuit of Micro Processor, DSP and so on that need fast transient response. NJW4153U2 NJW4153KV1 FEATURES Current mode Control Maximum Rating Input Voltage 45V Wide Operating Voltage Range 4.6V to 40V Switching Current 1.4A min. PWM Control Built-in Compensation Circuit Correspond to Ceramic Capacitor (MLCC) Oscillating Frequency 1MHz typ. (A ver.) Soft Start Function 4ms typ. UVLO (Under Voltage Lockout) Over Current Protection (Hiccup type) Thermal Shutdown Protection Standby Function Package Outline NJW4153U2 : SOT-89-5 NJW4153KV1 : ESON8-V1 PRODUCT CLASSIFICATION Version Oscillation Frequency Package NJW4153U2-A A 1MHz typ. SOT-89-5 NJW4153KV1-A A 1MHz typ. ESON8-V1 Part Number Ver.2013-03-21 Operating Temperature Range General Spec. -40°C to +85°C General Spec. -40°C to +85°C -1- NJW4153 PIN CONFIGURATION 5 (2) 4 1 2 3 PIN FUNCTION 1. ON/OFF 2. GND 3. IN4. SW 5. V+ 1 2 3 4 8 7 6 5 (Top View) PIN FUNCTION 1. SW 2. N.C. 3. V+ 4. N.C. 5. ON/OFF Exposed PAD on backside 6. GND connect to GND. 7. N.C. 8. IN(Bottom View) 8 7 6 5 1 2 3 4 NJW4153KV1 NJW4153U2 BLOCK DIAGRAM V+ SLOPE COMP. UVLO ON/OFF High: ON Low : OFF (Standby) CURRENT SENSE OCP Standby ON/OFF 450kΩ Low Frequency Control S Q OSC Buffer R SW TSD INER⋅AMP Soft Start PWM Vref 0.8V GND -2- Ver.2013-03-21 NJW4153 ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Supply Voltage V+ + V - SW pin Voltage VV-SW IN- pin Voltage VINON/OFF pin Voltage VON/OFF Power Dissipation PD MAXIMUM RATINGS +45 +45 -0.3 to +6 +45 SOT-89-5 625 (*1) 2,400 (*2) (Ta=25°C) UNIT V V V V mW 600 (*3) 1,800 (*4) Junction Temperature Range Tj -40 to +150 °C Operating Temperature Range Topr -40 to +85 °C Storage Temperature Range Tstg -40 to +150 °C (*1): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard size, 2Layers, Cu area 100mm2) (*2): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 4Layers) (For 4Layers: Applying 74.2×74.2mm inner Cu area and a thermal via hall to a board based on JEDEC standard JESD51-5) ESON8-V1 (*3): Mounted on glass epoxy board. (101.5×114.5×1.6mm: based on EIA/JEDEC standard, 2Layers FR-4, with Exposed Pad) (*4): Mounted on glass epoxy board. (101.5×114.5×1.6mm: based on EIA/JEDEC standard, 4Layers FR-4, with Exposed Pad) (For 4Layers: Applying 99.5×99.5mm inner Cu area and a thermal via hole to a board based on JEDEC standard JESD51-5) RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL Supply Voltage V+ Ver.2013-03-21 MIN. 4.6 TYP. – MAX. 40 UNIT V -3- NJW4153 (Unless otherwise noted, V+=VON/OFF=12V, Ta=25°C) ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL Under Voltage Lockout Block ON Threshold Voltage OFF Threshold Voltage Hysteresis Voltage VT_ON VT_OFF VHYS Soft Start Block Soft Start Time Oscillator Block Oscillation Frequency Oscillation Frequency (Low Frequency Control) Oscillation Frequency deviation (Supply voltage) Oscillation Frequency deviation (Temperature) Error Amplifier Block Reference Voltage Input Bias Current PWM Comparate Block Maximum Duty Cycle Minimum ON time MIN. TYP. MAX. UNIT V+= L → H V+= H → L 4.3 4.2 70 4.45 4.35 100 4.6 4.5 – V V mV TSS VB=0.75V 2 4 8 ms fOSC A version, VIN-=0.7V 900 1,000 1,100 kHz VIN-=0.4V – 370 – kHz fDV V+=4.6 to 40V – 1 – % fDT Ta= -40°C to +85°C – 5 – % -1.0% -0.1 0.8 – +1.0% +0.1 V µA 85 – 90 140 – 180 % ns – 8 – ms 0.45 1.9 – 0.75 2.4 1 Ω A µA fOSC_LOW TEST CONDITION VB IB MAXDUTY tON-min VIN-=0.7V Over Current Protection Block Cool Down Time tCOOL Output Block Output ON Resistance Switching Current Limit SW Leak Current RON ILIM ILEAK ISW=1A VON/OFF=0V, V+=45V, VSW=0V – 1.4 – ON/OFF Block ON Control Voltage VON VON/OFF= L → H 1.6 – V+ V OFF Control Voltage VOFF VON/OFF= H → L 0 – 0.5 V Pull-down Resistance RPD – 450 – kΩ General Characteristics Quiescent Current Standby Current IDD – – 3.9 – 4.4 1 mA µA -4- IDD_STB RL=no load, VIN-=0.7V VON/OFF=0V Ver.2013-03-21 NJW4153 TYPICAL APPLICATIONS L V IN V OUT CIN V+ CFB SW R2 NJW4153 ON/OFF ON/OFF GND IN- SBD COUT R1 High: ON Low: OFF (Standby) Ver.2013-03-21 -5- NJW4153 ■TYPICAL CHARACTERISTICS Oscillation Frequency vs. Supply Voltage (A ver., VIN-=0.7V, Ta=25°C) 0.81 Reference Voltage VB (V) Oscillation Frequnecny fOSC (kHz) 1020 Reference Voltage vs. Supply Voltage (Ta=25°C) 1010 1000 990 0.805 0.8 0.795 0.79 980 0 10 20 30 + Supply Voltage V (V) 40 0 10 20 30 + Supply Voltage V (V) 40 Quiescent Current vs. Supply Voltage (RL=no load, VIN-=0.7V, Ta=25°C) Quiescent Current IDD (mA) 5 4 3 2 1 0 0 -6- 10 20 30 Supply Voltage V+ (V) 40 Ver.2013-03-21 NJW4153 ■TYPICAL CHARACTERISTICS Oscillation Frequency vs Temperature + (A ver., V =12V, VIN-=0.7V) 0.810 Reference Voltage VB (V) Oscillation Frequency fosc (kHz) 1100 Reference Voltage vs. Temperature + (V =12V) 1050 1000 950 900 0.805 0.800 0.795 0.790 850 -50 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) Output ON Resistance vs. Temperature (ISW=1A) Switching Current Limit vs. Temperature 0.8 2.4 + V =40V + V =12V 2.2 2.0 1.8 + V =4.6V 1.6 1.4 1.2 Output ON Resistance RON (Ω) Switching Current Limit I LIM (A) 2.6 0.7 + V =4.6V + V =12V + V =40V 0.6 0.5 0.4 0.3 0.2 0.1 0.0 1.0 -50 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) Under Voltage Lockout Voltage vs. Temperature 4.6 4.5 VT_ON 4.45 4.4 VT_OFF 4.35 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) Soft Start Time vs. Temperature + (V =12V, VB=0.75V) 8 Soft Start Time Tss (ms) 4.55 Threshold Voltage (V) -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) 7 6 5 4 3 2 4.3 -50 Ver.2013-03-21 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) -7- NJW4153 ■TYPICAL CHARACTERISTICS Minimum ON Time vs. Temperature (V+=12V) 95 Maximum Duty Cycle MAXDUTY (%) 200 Minimum ON Time tON-min [ns] 190 180 170 160 150 140 130 120 110 Maximum Duty Cycle vs. Temperature + (V =12V, VIN-=0.7V) 100 94 93 92 91 90 89 88 87 86 85 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) -50 Quiescent Current vs. Temperature (RL=no load, VIN-=0.7V) Standby Current vs. Temperature (VON/OFF=0V) 1 4.5 4 3.5 + V =40V + V =12V + V =4.6V 3 2.5 2 Standby Current IDD_STB (µA) Quiescent Current IDD (mA) 5 0.8 + V =40V 0.6 0.4 + V =12V + V =4.6V 0.2 0 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) Switching Leak Current vs. Temperature + (V =45V,VON/OFF=0V, VSW=0V) 5 Switching Leak Current ILEAK (µA) -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) 4 3 2 1 0 -50 -8- -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) Ver.2013-03-21 NJW4153 ApplicationNJW4153 Manual Technical Information PIN DESCRIPTIONS PIN NAME PIN NUMBER ESON8 SOT-89-5 ON/OFF 1 5 GND 2 6 IN- 3 8 SW V+ N.C. Exposed PAD 4 5 – 1 3 2, 4, 7 – – Ver.2013-03-21 FUNCTION ON/OFF Control pin The ON/OFF pin internally pulls down with 450kΩ. Normal Operation at the time of High Level. Standby Mode at the time of Low Level or OPEN. GND pin Output Voltage Detecting pin Connects output voltage through the resistor divider tap to this pin in order to voltage of the IN- pin become 0.8V. Switch Output pin of Power MOSFET Power Supply pin for Power Line Non connection Connect to GND (Only ESOP8 PKG) -9- NJW4153 NJW4153Application Manual Technical Information Description of Block Features 1. Basic Functions / Features Error Amplifier Section (ER⋅AMP) 0.8V±1% precise reference voltage is connected to the non-inverted input of this section. To set the output voltage, connects converter's output to inverted input of this section (IN- pin). If requires output voltage over 0.8V, inserts resistor divider. Because the optimized compensation circuit is built-in, the application circuit can be composed of minimum external parts. PWM Comparator Section (PWM), Oscillation Circuit Section (OSC) The NJW4153 uses a constant frequency, current mode step down architecture. The oscillation frequency is 1,000kHz (typ.) at A version. The PWM signal is output by feedback of output voltage and slope compensation switching current at the PWM comparator block. The maximum duty ratio is 90% (typ.). The minimum ON time is limited to 140nsec (typ.). The buck converter of ON time is decided the following formula. ton = VOUT [s] VIN × fOSC VIN shows input voltage and VOUT shows output voltage. When the ON time becomes below in tON-min, in order to maintain output voltage at a stable state, change of duty or pulse skip operation may be performed. Power MOSFET (SW Output Section) The power is stored in the inductor by the switch operation of built-in power MOSFET. The output current is limited to 1.4A(min.) the overcurrent protection function. In case of step-down converter, the forward direction bias voltage is generated with inductance current that flows into the external regenerative diode when MOSFET is turned off. The SW pin allows voltage between the V+ pin and the SW pin up to +45V. However, you should use an Schottky diode that has low saturation voltage. Power Supply, GND pin (V+ and GND) In line with switching element drive, current flows into the IC according to frequency. If the power supply impedance provided to the power supply circuit is high, it will not be possible to take advantage of IC performance due to input voltage fluctuation. Therefore insert a bypass capacitor close to the V+ pin – the GND pin connection in order to lower high frequency impedance. - 10 - Ver.2013-03-21 NJW4153 ApplicationNJW4153 Manual Technical Information Description of Block Features (Continued) 2. Additional and Protection Functions / Features Under Voltage Lockout (UVLO) The UVLO circuit operating is released above V+=4.45V(typ.) and IC operation starts. When power supply voltage is low, IC does not operate because the UVLO circuit operates. There is 100mV(typ.) width hysteresis voltage at rise and decay of power supply voltage. Hysteresis prevents the malfunction at the time of UVLO operating and releasing. Soft Start Function (Soft Start) The output voltage of the converter gradually rises to a set value by the soft start function. The soft start time is 4ms (typ.). It is defined with the time of the error amplifier reference voltage becoming from 0V to 0.75V. The soft start circuit operates after the release UVLO and/or recovery from thermal shutdown. The operating frequency is controlled with a low frequency 370kHz, until voltage or the IN- pin becomes approximately 0.65V. 0.8V Vref, IN- pin Voltage OSC Waveform ON SW pin OFF UVLO(4.45V typ.) Release, Standby, Recover from Thermal Shutdow n Low Frequency Control V IN-=approx 0.65V Soft Start time: Tss=4ms(typ.) to V B=0.75V Steady Operaton Soft Start effective period to V B=0.8V Fig. 1. Startup Timing Chart Ver.2013-03-21 - 11 - NJW4153 NJW4153Application Manual Technical Information Description of Block Features (Continued) Over Current Protection Circuit (OCP) NJW4153 contains overcurrent protection circuit of hiccup architecture. The overcurrent protection circuit of hiccup architecture is able to decrease heat generation at the overload. The NJW4153 output returns automatically along with release from the over current condition. At when the switching current becomes ILIM or more, the overcurrent protection circuit is stopped the MOSFET output. The switching output holds low level down to next pulse output at OCP operating. When IN- pin voltage becomes 0.5V or less, it operates with 370kHz (typ.). At the same time starts pulse counting, and stops the switching operation when the overcurrent detection continues approx 1ms. After NJW4153 switching operation was stopped, it restarts by soft start function after the cool down time of approx 8ms (typ.). IN- pin Voltage 0.8V 0.5V 0V Oscillation Frequency fosc=1MHz typ. OCP Operates Oscillation Frequency f OSC_LIM=370kHz typ. ON SW pin OFF Sw itching Current ILIM 0 Pulse by Pulse Static Status Pulse Count :about 1ms Cool Dow n time :8ms typ. Detect Overcurrent Soft Start Fig. 2. Timing Chart at Over Current Detection Thermal Shutdown Function (TSD) When Junction temperature of the NJW4153 exceeds the 165°C*, internal thermal shutdown circuit function stops SW function. When junction temperature decreases to 150°C* or less, SW operation returns with soft start operation. The purpose of this function is to prevent malfunctioning of IC at the high junction temperature. Therefore it is not something that urges positive use. You should make sure to operate within the junction temperature range rated (150°C). (* Design value) ON/OFF Function The NJW4153 stops the operating and becomes standby status when the ON/OFF pin becomes less than 0.5V. The ON/OFF pin internally pulls down with 450kΩ, therefore the NJW4153 becomes standby mode when the ON/OFF pin is OPEN. You should connect this pin to V+ when you do not use standby function. - 12 - Ver.2013-03-21 NJW4153 ApplicationNJW4153 Manual Technical Information Application Information Inductors Because a large current flows to the inductor, you should select the inductor with the large current capacity not to saturate. Optimized inductor value is determined by the input voltage and output voltage. The Optimized inductor value: (It is a reference value.) ViIN=12V → VOUT=5.0V : L < = 10µH ViIN=24V → VOUT=5.0V : L < = 10µH You should set the inductor as a guide from above mentioned value to half value. Reducing L decreases the size of the inductor. However a peak current increases and adversely affects the efficiency. (Fig. 3.) Moreover, you should be aware that the output current is limited because it becomes easy to operating to the overcurrent limit. The peak current is decided the following formula. ∆IL = (VIN − VOUT ) × VOUT L × VIN × fOSC Ipk = IOUT + [A] ∆ IL [A] 2 Current Peak Current IPK Indunctor Ripple Current ∆IL Peak Current IPK Output Current IOUT Indunctor Ripple Current ∆IL 0 tON tOFF Reducing L Value tON tOFF Increasing L value Fig. 3. Inductor Current State Transition (Continuous Conduction Mode) Ver.2013-03-21 - 13 - NJW4153 NJW4153Application Manual Technical Information Application Information (Continued) Catch Diode When the switch element is in OFF cycle, power stored in the inductor flows via the catch diode to the output capacitor. Therefore during each cycle current flows to the diode in response to load current. Because diode's forward saturation voltage and current accumulation cause power loss, a Schottky Barrier Diode (SBD), which has a low forward saturation voltage, is ideal. An SBD also has a short reverse recovery time. If the reverse recovery time is long, through current flows when the switching transistor transitions from OFF cycle to ON cycle. This current may lower efficiency and affect such factors as noise generation. Input Capacitor Transient current flows into the input section of a switching regulator responsive to frequency. If the power supply impedance provided to the power supply circuit is large, it will not be possible to take advantage of the NJW4153 performance due to input voltage fluctuation. Therefore insert an input capacitor as close to the MOSFET as possible. A ceramic capacitor is the optimal for input capacitor. The effective input current can be expressed by the following formula. IRMS = IOUT × VOUT × (VIN − VOUT ) VIN [A] In the above formula, the maximum current is obtained when VIN = 2 × VOUT, and the result in this case is IRMS = IOUT (MAX) ÷ 2. When selecting the input capacitor, carry out an evaluation based on the application, and use a capacitor that has adequate margin. Output Capacitor An output capacitor stores power from the inductor, and stabilizes voltage provided to the output. Because NJW4153 corresponds to the output capacitor of low ESR, the ceramic capacitor is the optimal for compensation. The Optimized capacitor value: (It is a reference value.) VOUT =5.0V : COUT > = 22µF In addition, you should consider varied characteristics of capacitor (a frequency characteristic, a temperature characteristic, a DC bias characteristic and so on) and unevenness peculiar to a capacitor supplier enough. Therefore when selecting a capacitors, you should confirm the characteristics with supplier datasheets. When selecting an output capacitor, you must consider Equivalent Series Resistance (ESR) characteristics, ripple current, and breakdown voltage. The output ripple noise can be expressed by the following formula. Vripple( p −p ) = ESR × ∆IL [ V ] The effective ripple current that flows in a capacitor (Irms) is obtained by the following equation. Irms = - 14 - ∆I L [ Arms ] 2 3 Ver.2013-03-21 NJW4153 ApplicationNJW4153 Manual Technical Information Application Information (Continued) Setting Output Voltage, Compensation Capacitor The output voltage VOUT is determined by the relative resistances of R1, R2. The current that flows in R1, R2 must be a value that can ignore the bias current that flows in ER AMP. ⎛ R2 ⎞ VOUT = ⎜ + 1⎟ × VB [ V ] R 1 ⎝ ⎠ The zero points are formed with R2 and CFB, and it makes for the phase compensation of NJW4153. The zero point is shown the following formula. f Z1 = 1 [Hz] 2 × π × R2 × C FB You should set the zero point as a guide from 30kHz to 50kHz. Ver.2013-03-21 - 15 - NJW4153 NJW4153Application Manual Technical Information Application Information (Continued) Board Layout In the switching regulator application, because the current flow corresponds to the oscillation frequency, the substrate (PCB) layout becomes an important. You should attempt the transition voltage decrease by making a current loop area minimize as much as possible. Therefore, you should make a current flowing line thick and short as much as possible. Fig.4. shows a current loop at step-down converter. Especially, should lay out high priority the loop of CIN-SW-SBD that occurs rapid current change in the switching. It is effective in reducing noise spikes caused by parasitic inductance. NJW4153 Built-in SW V IN CIN NJW4153 Built-in SW L SBD COUT V IN CIN (a) Buck Converter SW ON L SBD COUT (b) Buck Converter SW OFF Fig. 4. Current Loop at Buck Converter Concerning the GND line, it is preferred to separate the power system and the signal system, and use single ground point. The voltage sensing feedback line should be as far away as possible from the inductance. Because this line has high impedance, it is laid out to avoid the influence noise caused by flux leaked from the inductance. Fig. 5. shows example of wiring at buck converter. Fig. 6 shows the PCB layout example. L V+ V IN V OUT SW CIN SBD COUT RL The condenser is connected near an IC. NJW4153 CFB INR2 GND Separate Digital(Signal) GND from Pow er GND R1 To avoid the influence of the voltage drop, the output voltage should be detected near the load. Because IN- pin is high impedance, the voltage detection resistance: R1/R2 is put as much as possible near IC(IN-). Fig. 5. Board Layout at Buck Converter - 16 - Ver.2013-03-21 NJW4153 ApplicationNJW4153 Manual Technical Information Application Information (Continued) GNDOUT VOUT Power GND Area COUT GND IN L SBD CIN1 VIN CIN2 Feed back signal 1pin R2 ON/OFF R1 RFB CFB Signal GND Area Connect Signal GND line and Power GND line on backside pattern Fig. 6. Layout Example (upper view) Ver.2013-03-21 - 17 - NJW4153 NJW4153Application Manual Technical Information Calculation of Package Power A lot of the power consumption of buck converter occurs from the internal switching element (Power MOSFET). Power consumption of NJW4153 is roughly estimated as follows. Input Power: Output Power: Diode Loss: NJW4153 Power Consumption: Where: VIN VOUT VF OFF duty PIN = VIN × IIN [W] POUT = VOUT × IOUT [W] PDIODE = VF × IL(avg) × OFF duty [W] PLOSS = PIN − POUT − PDIODE [W] : Input Voltage for Converter : Output Voltage of Converter : Diode's Forward Saturation Voltage : Switch OFF Duty IIN IOUT IL(avg) : Input Current for Converter : Output Current of Converter : Inductor Average Current Efficiency (η) is calculated as follows. η = (POUT ÷ PIN) × 100 [%] You should consider temperature derating to the calculated power consumption: PD. You should design power consumption in rated range referring to the power dissipation vs. ambient temperature characteristics (Fig. 7). NJW4153U2 (SOT89-5 Package) Power Dissipation vs. Ambient Temperature (Tj=~150°C) 3000 At on 4 layer PC Board (*6) At on 2 layer PC Board (*5) 2500 2000 1500 1000 500 Power Dissipation PD (mW) 3000 Power Dissipation PD (mW) NJW4153KV1 (ESON8 Package) Power Dissipation vs. Ambient Temperature (Tj=~150°C) At on 4 layer PC Board (*8) At on 2 layer PC Board (*7) 2500 2000 1500 1000 500 0 0 -50 -25 0 25 50 75 100 Ambient Temperature Ta (°C) 125 150 -50 -25 0 25 50 75 100 Ambient Temperature Ta (°C) 125 150 (*5): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard size, 2Layers, Cu area 100mm2) (*6): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 4Layers) (For 4Layers: Applying 74.2×74.2mm inner Cu area and a thermal via hall to a board based on JEDEC standard JESD51-5) (*7): Mounted on glass epoxy board. (101.5×114.5×1.6mm: based on EIA/JEDEC standard, 2Layers FR-4, with Exposed Pad) (*8): Mounted on glass epoxy board. (101.5×114.5×1.6mm: based on EIA/JEDEC standard, 4Layers FR-4, with Exposed Pad) (For 4Layers: Applying 99.5×99.5mm inner Cu area and a thermal via hole to a board based on JEDEC standard JESD51-5) Fig. 7. Power Dissipation vs. Ambient Temperature Characteristics - 18 - Ver.2013-03-21 NJW4153 ApplicationNJW4153 Manual Technical Information Application Design Examples Busk Converter Application Circuit IC : NJW4153U2-A Input Voltage : VIN=12V, 24V Output Voltage : VOUT=5V Output Current : IOUT=1A Oscillation frequency : fosc=1MHz L 10µH3.4A V IN=12V, 24V V+ V OUT =5V CFB 22pF SW R2 160kΩ NJW4153 CIN1 10µF/50V ON/OFF GND IN- ON/OFF SBD COUT 22µF/25V R1 30kΩ High: ON Low: OFF (Standby) IC Reference Qty. 1 L 1 CDRH8D28HPNP-100N SBD CIN COUT CFB R1 R2 1 1 1 1 1 1 CMS16 UMK325BJ106MM GRM32EB31E226KE15 22pF 30kΩ 160kΩ Ver.2013-03-21 Part Number NJW4153U2-A Description Internal 1A MOSFET SW.REG. IC Inductor 10µH, 3.4A(Ta=25°C) / 2.5A(Ta=100°C) Schottky Diode 40V, 3A Ceramic Capacitor 3225 10µF, 50V, X5R Ceramic Capacitor 3225 22µF, 25V, B Ceramic Capacitor 1608 22pF, 50V, CH Resistor 1608 30kΩ, ±1%, 0.1W Resistor 1608 160kΩ, ±1%, 0.1W Manufacturer New JRC Sumida Toshiba Taiyo Yuden Murata Std. Std. Std. - 19 - NJW4153 NJW4153Application Manual Technical Information Application Characteristics :NJW4153U2-A At VOUT=5.0V setting (R1=30kΩ, R2=160kΩ) Efficiency vs. Output Current (A ver., VOUT=5V, Ta=25°C) Output Voltage vs. Output Current (A ver., Ta=25°C) 100 5.3 f=1MHz L=10µH 90 Output Voltage VOUT (V) Efficiency η (%) 80 70 VIN=6V VIN=12V VIN=18V VIN=24V 60 50 40 30 20 f=1MHz L=10µH 5.2 5.1 5 VIN=6V VIN=12V VIN=18V VIN=24V 4.9 4.8 10 0 4.7 1 10 100 Output Current IOUT (mA) 1000 1 10 100 Output Current IOUT (mA) 1000 At VOUT=3.3V setting (R1=47kΩ, R2=150kΩ) Efficiency vs. Output Current (A ver., VOUT=3.3V, Ta=25°C) 100 Output Voltage vs. Output Current (A ver., Ta=25°C) 3.5 f=1MHz L=10µH 90 Output Voltage VOUT (V) Efficiency η (%) 80 70 VIN=6V VIN=12V VIN=18V VIN=24V 60 50 40 30 20 10 3.4 3.35 3.3 VIN=6V VIN=12V VIN=18V VIN=24V 3.25 3.2 3.15 0 1 - 20 - f=1MHz L=10µH 3.45 10 100 Output Current IOUT (mA) 1000 3.1 1 10 100 Output Current IOUT (mA) 1000 Ver.2013-03-21 NJW4153 Technical Information Inverting Converter Application Circuit CC 0.47µF/50V V IN=15V V OUT = -15V SBD CIN 10µF/50V V+ CFB Optional SW NJW4153 ON/OFF GND IN- L 10µH/3.4A COUT 22µF/25V R2 51kΩ R1 910kΩ ON/OFF High: ON Low: OFF (Standby) IC Reference Qty. 1 Part Number NJW4153U2-A L 1 CDRH8D28HPNP-100N SBD CIN COUT CC CFB R1 R2 1 1 1 1 0 1 1 CMS16 UMK325BJ106MM GRM32EB31E226KE15 GRM21BB31H474KA87 ⎯ (Optional) 910kΩ 51kΩ Description Internal 1A MOSFET SW.REG. IC Inductor 10µH, 3.4A(Ta=25°C) / 2.5A(Ta=100°C) Schottky Diode 40V, 3A Ceramic Capacitor 3225 10µF, 50V, X5R Ceramic Capacitor 3225 22µF, 25V, B Ceramic Capacitor 2012 0.47µF, 50V, B Optional Resistor 1608 910kΩ, ±1%, 0.1W Resistor 1608 51kΩ, ±1%, 0.1W Efficiency vs. Output Current (A ver. , VIN=15V, VOUT=-15V, Ta=25°C) 90 Output Voltage VOUT (V) f=1MHz L=10µH Efficiency η (%) 80 70 60 50 40 30 Sumida Toshiba Taiyo Yuden Murata Murata ⎯ Std. Std. Output Voltage vs. Output Current (A ver. , VIN=15V, Ta=25°C) -17.0 100 Manufacturer New JRC f=1MHz L=10µH -16.5 -16.0 -15.5 -15.0 -14.5 -14.0 20 -13.5 10 -13.0 0 1 Ver.2013-03-21 10 100 Output Current IOUT (mA) 1000 1 10 100 Output Cuurent IOUT (mA) 1000 - 21 - NJW4153 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. - 22 - Ver.2013-03-21