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ADP2118

Analog Devices
Part Number ADP2118
Manufacturer Analog Devices
Description Step-Down DC-to-DC Converter
Published Feb 8, 2010
Detailed Description Data Sheet 3 A, 1.2 MHz/600 kHz, High Efficiency, Synchronous, Step-Down DC-to-DC Regulator ADP2118 FEATURES 3 A conti...
Datasheet PDF File ADP2118 PDF File

ADP2118
ADP2118


Overview
Data Sheet 3 A, 1.
2 MHz/600 kHz, High Efficiency, Synchronous, Step-Down DC-to-DC Regulator ADP2118 FEATURES 3 A continuous output current 75 mΩ and 40 mΩ integrated FET ±1.
5% output accuracy Input voltage range from 2.
3 V to 5.
5 V Output voltage from 0.
6 V to VIN 600 kHz or 1.
2 MHz fixed switching frequency Synchronizable between 600 kHz and 1.
4 MHz Selectable synchronize phase shift: 0o or 180o Selectable PWM or PFM mode operation Current mode architecture Precision enable input Power good output Voltage tracking input Integrated soft start Internal compensation Starts up into a precharged output UVLO, OVP, OCP, and thermal shutdown Available in 16-lead, 4 mm × 4 mm LFCSP package Supported by ADIsimPower design tool APPLICATIONS Point of load conversion Communications and networking equipments Industrial and instrumentation Consumer electronics Medical appliances C1 0.
1µF R1 10Ω R2 10kΩ 16 15 14 13 VIN CIN 5V 100µF X5R, 6.
3V PGOOD EN VIN PVI N 1 SYNC/MODE 2 FREQ 3 TRK ADP2118 4 FB PVIN 12 SW 11 SW 10 SW 9 L 1µH VOUT COUT 100µF 3.
3V 3A X5R, 6.
3V GND PGND PGND PGND RBOT RTOP 2.
21kΩ 10kΩ 5678 Figure 1.
Typical Applications Circuit 08301-001 EFFICIENCY (%) GENERAL DESCRIPTION The ADP2118 is a low quiescent current, synchronous, step-down dc-to-dc regulator in a compact 4mm × 4mm LFCSP package.
It uses a current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response.
Under light loads, the ADP2118 can be configured to operate in pulse frequency modulation (PFM) mode that reduces switching frequency to save power.
The ADP2118 runs from input voltages of 2.
3 V to 5.
5 V.
The output voltage of the ADP2118ACPZ-R7 is adjustable from 0.
6 V to input voltage (VIN), and the ADP2118ACPZ-x.
x-R7 are available in preset output voltage options of 1.
2 V and 3.
3 V.
The ADP2118 requires minimal external parts and provides a high efficiency solution with its integrated power switch, synchronous rec...


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