The ADP2119/ADP2120 are low quiescent current,
Synchronous step-down DC-DC regulatorin a compact 3mm x 3mm LFCSP_WD package. Both devices feature a current-mode, constant-frequency pulse-width modulation (PWM) control scheme that provides excellent stability and transient response. Under light load conditions, these devices can be configured to operate in pulse-frequency modulation (PFM) mode to reduce switching frequency and save power.
The ADP2119/ADP2120 support input voltages from 2.3V to 5.5V. The adjustable version of the output voltage can be from 0.6V to the input voltage (VIN) range, the fixed output version offers preset output voltage options: 3.3V, 2.5V, 1.8V, 1.5V, 1.2V, and 1.0V. The ADP2119/ADP2120 integrate power switches, synchronous rectifiers, and internal compensation, providing a high efficiency solution with minimal external components. Each IC draws less than 3μA from the input source when disabled. Other key features include undervoltage lockout (UVLO), integrated soft-start to limit inrush current at startup, overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD).
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- Point-of-load conversion
- Communications and networking equipment
- Industrial and instrumentation
- Consumer electronic devices
- Medical equipment
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Advantages and features
- Continuous output current: 2A
- 145 mΩ and 70 mΩ integrated FETs
- Input voltage range: 2.3 V to 5.5 V
- Output voltage range: 0.6V to VIN
- Output accuracy: ±1.5%
- 1.2MHz fixed switching frequency
- Synchronizable between 1.0MHz and 2MHz
- Selectable PWM or PFM operation
- Current-mode architecture
- Precision threshold enable input
- Power good indication
- Voltage tracking input
- Integrated soft start
- Internal compensation
- Start with pre-charge output
- Undervoltage lockout, overvoltage protection, overcurrent protection, and thermal shutdown
- 10-pin 3mm x 3mm LFCSP_WD package
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