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ADP2119

Analog Devices
Part Number ADP2119
Manufacturer Analog Devices
Description Step-Down DC-to-DC Regulators
Published Aug 14, 2010
Detailed Description Data Sheet 2 A/1.25 A, 1.2 MHz, Synchronous, Step-Down DC-to-DC Regulators ADP2119/ADP2120 FEATURES Continuous output ...
Datasheet PDF File ADP2119 PDF File

ADP2119
ADP2119

Overview
Data Sheet 2 A/1.
25 A, 1.
2 MHz, Synchronous, Step-Down DC-to-DC Regulators ADP2119/ADP2120 FEATURES Continuous output current ADP2119: 2 A ADP2120: 1.
25 A 145 mΩ and 70 mΩ integrated MOSFETs Input voltage range from 2.
3 V to 5.
5 V Output voltage from 0.
6 V to VIN ±1.
5% output accuracy 1.
2 MHz fixed switching frequency Synchronizable between 1 MHz and 2 MHz Selectable PWM or PFM mode operation Current mode architecture Precision threshold enable input Power-good flag Voltage tracking Integrated soft start Internal compensation Startup with precharged output UVLO, OVP, OCP, and thermal shutdown 10-lead, 3 mm × 3 mm LFCSP_WD package Supported by ADIsimPower™ design tool APPLICATIONS Point of load conversion Communications and networking equipment Industrial and instrumentation Consumer electronics Medical applications GENERAL DESCRIPTION The ADP2119/ADP2120 are low quiescent current, synchronous, step-down dc-to-dc regulators in a compact 3 mm × 3 mm LFCSP_WD package.
Both devices use a current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response.
Under light load conditions, they can be configured to operate in a pulse frequency modulation (PFM) mode, which reduces switching frequency to save power.
The ADP2119/ADP2120 support input voltages from 2.
3 V to 5.
5 V.
The output voltage can be adjusted from 0.
6 V up to the input voltage (VIN) for the adjustable version, whereas the fixed output version is available in preset output voltage options of 3.
3 V, 2.
5 V, 1.
8 V, 1.
5 V, 1.
2 V, and 1.
0 V.
The ADP2119/ADP2120 require minimal external parts and provide a high efficiency solution with their integrated power switches, synchronous rectifiers, and internal compensation.
Each IC draws less than 2 µA current from the input source when it is disabled.
Other key features include undervoltage lockout (UVLO), integrated soft start to limit inrush current at startup, overvoltage protection (OVP), overcurrent protect...


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