ADP2121 Datasheet PDF | Analog Devices

Analog Devices ADP2121

The ADP2121 is a high frequency, low quiescent current step-down dc-to-dc converter optimized for portable applications in which board area and battery life are critical constraints. The 6 MHz operating frequency enables the use of tiny ceramic inductors and capacitors. At light load conditions in auto mode, the ADP2121 can automatically enter a power-saving mode that uses pulse-frequency modulation (PFM) to reduce the effective switching frequency and ensure the longest battery life in portable applications.

Part No.	ADP2121
Datasheet	ADP2121 Download
Manufacturer	Analog Devices
Description	Synchronous Step-Down DC-to-DC Converter
Buy	Stock & Price

FEATURES

Peak efficiency: 92% Operating frequency: 6 MHz Typical quiescent current in auto mode: 36 μA Fixed output voltage: 1.8 V, 1.82 V, 1.85 V, 1.875 V, 2.3 V Maximum guaranteed load current: 600 mA at VIN = 2.7 V to 5.5 V Input voltage: 2.3 V to 5.5 V Typical shutdown supply current: 0.3 μA Automatic power-saving mode Compatible with tiny multilayer inductors Internal synchronous rectifier Internal compensation Internal soft start Output to ground short-circuit protection Cycle-by-cycle current-limit protection Enable/shutdown logic input Undervoltage lockout Thermal shutdown protection Ultrasmall 6-ball, 0.4 mm pitch, 1.17 mm2 WLCSP

APPLICATIONS

Mobile phones Digital cameras Digital audio Portable equipment

GENERAL DESCRIPTION

Additionally, the synchronous rectification improves efficiency and results in fewer external components. At high load currents, the device uses a voltage regulating pulsewidth modulation (PWM) mode that maintains a constant frequency with excellent stability and transient response.