6 1 Publication Order Number: NCP1521B/D 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50% 0 NCP1521B VOUT = 3.3 V VIN = 4.2 V TA = 25°C 100 200 300 400 500 600 700 IOUT (mA) Figure 3. Efficiency vs. Output Current Vbattery VIN 1 4.7 mF GND 2 Q1 Q2 PWM/PFM ...
PFM Mode −40 +40 mV VOUT=2.0 V to 3.3 V, IOUT=0 A, PFM Mode −2 +2 % RDS(on) PMOS On Resistance VIN = VGS = 3.6 V 135 mW NMOS On Resistance VIN = VGS = 3.6 V 95 mW TTSD Thermal Shutdown 150 °C THYS Thermal Shutdown Hysteresis 15 °C Product parametric performance...
PFM No Switching Standby Current, EN Low Undervoltage Lockout (VIN Falling) EN PIN 1 3 VIN 2.7 - 5.5 V 1 3 Iq ON - 30 45 mA 1 3 Iq OFF - 0.2 1.5 mA 1 3 VUVLO 2.2 2.4 2.55 V Positive going Input High Voltage Threshold, EN0 Signal Negative going Input High Voltage Threshold, ...
l Synchronous Step-Down DC/DC l High Efficiency :93%(TYP) l Low Ripple Voltage :10mV l Output Current :500mA l Oscillation Frequency :1.2MHz l PWM/PFM Automatic Switching Control l Maximum Duty Ratio :100% l Ceramic Capacitor Compatible l Ultra Small Packages :SOT-23-5 ...
NCP1422 800 mA Sync−Rect PFM Step−Up DC−DC Converter with True−Cutoff and Ring−Killer NCP1422 is a monolithic micropower high−frequency step−up switching converter IC specially designed for battery−operated hand−held electronic products up to 800 mA loading. It integrates ...
PWM/PFM切换控制的升压/回扫型开关稳压器,USB高边开关IC,高音质音频运算放大器,低失调电压、小型单路CMOS运算放大器,防电池反接的整流型开关IC,超低噪声、超低失真的音量控制IC,电流模式、内置2.5AMOSFET的降压型开关稳压器,可编程电源管理IC,功率放大器,搭载PD和红光/红外光LED的生物监测传感器,双路、低噪声、...
PWM/PFM切换控制的升压/回扫型开关稳压器,USB高边开关IC,高音质音频运算放大器,低失调电压、小型单路CMOS运算放大器,防电池反接的整流型开关IC,超低噪声、超低失真的音量控制IC,电流模式、内置2.5AMOSFET的降压型开关稳压器,可编程电源管理IC,功率放大器,搭载PD和红光/红外光LED的生物监测传感器,双路、低噪声、...
l Synchronous Step-Down DC/DC l High Efficiency :93%(TYP) l Low Ripple Voltage :10mV l Output Current :500mA l Oscillation Frequency :1.2MHz l PWM/PFM Automatic Switching Control l Maximum Duty Ratio :100% l Ceramic Capacitor Compatible l Ultra Small Packages :SOT-23-5 ...
0 1 Publication Order Number: NCP1521B/D NCP1522B 100 95 90 85 80 75 70 65 60 55 50 0 VOUT = 3.3 V VIN = 4.2 V TA = 25°C 100 200 300 400 500 IOUT, OUTPUT CURRENT (mA) Figure 3. Efficiency vs. Output Current 600 Vbattery VIN 1 4.7 mF GND 2 Q1 Q2 PWM/PFM CONTROL I...
5 1 Publication Order Number: NCP1421/D NCP1421 0.5 V Chip Enable FB + 1− PFM REF 4 Voltage Reference LBI/EN 2 1.20 V + − VBAT BAT M3 5 ZLC + − + 20 mV CONTROL LOGIC TRUE CUTOFF CONTROL _ZCUR _MSON _TSDON VDD _MAINSW2ON M2 SENSEFETt M1 LX VDD 7 OUT 8 VOUT _...