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ADP1621 Datasheet

Part Number ADP1621
Manufacturers Analog Devices
Logo Analog Devices
Description Current-Mode Step-Up DC/DC Controller
Datasheet ADP1621 DatasheetADP1621 Datasheet (PDF)

www.DataSheet4U.com Constant-Frequency, Current-Mode Step-Up DC/DC Controller ADP1621 FEATURES 92% efficiency (no sense resistor required) ±1.0% initial accuracy IC supply voltage range: 2.9 V to 5.5 V Power-input voltage as low as 1.0 V Capable of high supply input voltage (>5.5 V) with an external NPN or a resistor VIN UVLO and 35 mA shunt regulator External slope compensation with 1 resistor Programmable operating frequency (100 kHz to 1.5 MHz) with 1 resistor Lossless current sensing for sw.

  ADP1621   ADP1621






Part Number ADP162
Manufacturers Analog Devices
Logo Analog Devices
Description CMOS Linear Regulators
Datasheet ADP1621 DatasheetADP162 Datasheet (PDF)

Data Sheet Ultralow Quiescent Current, 150 mA, CMOS Linear Regulators ADP160/ADP161/ADP162/ADP163 FEATURES Ultralow quiescent current IQ = 560 nA with 0 µA load IQ = 860 nA with 1 µA load Stable with 1 µF ceramic input and output capacitors Maximum output current: 150 mA Input voltage range: 2.2 V to 5.5 V Low shutdown current: <50 nA typical Low dropout voltage: 195 mV at 150 mA load Initial accuracy: ±1% Accuracy over line, load, and temperature: ±3.5% 15 fixed output voltage options: 1.2 V .

  ADP1621   ADP1621







Current-Mode Step-Up DC/DC Controller

www.DataSheet4U.com Constant-Frequency, Current-Mode Step-Up DC/DC Controller ADP1621 FEATURES 92% efficiency (no sense resistor required) ±1.0% initial accuracy IC supply voltage range: 2.9 V to 5.5 V Power-input voltage as low as 1.0 V Capable of high supply input voltage (>5.5 V) with an external NPN or a resistor VIN UVLO and 35 mA shunt regulator External slope compensation with 1 resistor Programmable operating frequency (100 kHz to 1.5 MHz) with 1 resistor Lossless current sensing for switch-node voltage <30 V Resistor current sensing for switch-node voltage >30 V Synchronizable to external clock Current-mode operation for excellent line and load transient responses 10 μA shutdown current Current limit and thermal overload protection Soft start in 2048 clock cycles TYPICAL APPLICATION CIRCUIT VIN = 3.3V L1 4.7µH D1 C3 1µF 10V C4 0.1µF 10V PIN IN RS 80Ω CS R1 35.7kΩ 1% VOUT = 5V 1A ADP1621 SDSN COMP RCOMP 9.09kΩ CCOMP 1.8nF FREQ GND RFREQ 31.6kΩ 1% AGND C1 = MURATA GRM31CR60J476M COUT3 = SANYO POSCAP 6TPE150M L1 = TOKO FDV0630-4R7M GATE PGND FB M1 COUT1 1µF 10V COUT2 10µF 10V R2 11.5kΩ 1% COUT3 150µF 6.3V ×2 C2 120pF C1 47µF 6.3V M1 = VISHAY Si7882DP D1 = VISHAY SSA33L Figure 1. High Efficiency Output Boost Converter in Lossless Mode, 3.3 V Input, 5 V Output (Bootstrapped) 100 90 80 APPLICATIONS APD bias Portable electronic equipment Isolated dc/dc converter Step-up/step-down dc/dc converter LED driver for laptop computer and navigation system LCD backlighti.


2007-01-14 : ADN2880    ADN2928    ADP1621    ADP1710    ADP1711    ADP1821    ADP1822    ADP1823    ADP1864    ADP2105   


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