The ADP2503/ADP2504 are Analog Devices' 600mA/1000mA, 2.5 MHz buck-boost DC-to-DC converters. The series features a 1mm height package, a compact PCB footprint, and can operate over a 2.3 V to 5.5 V input voltage range, with a typical quiescent current consumption of 38μA. The ADP2503/ADP2504 also have a variety of features including seamless mode switching, 2.5 MHz operation, 1μH inductor, fixed output voltage, 600mA (ADP2503) and 1000mA (ADP2504) output current options, load disconnect boost converter configuration, SYNC pin with three different modes including power save mode (PSM) to improve light efficiency.
The ADP2503/ADP2504 converters provide step‑up/step‑down regulation from 2.3 V to 5.5 V input and fixed output options from 2.8 V to 5.0 V. They feature a 1 mm height profile, 10‑lead LFCSP package, seamless mode transition, internal compensation, soft‑start, and a SYNC pin that supports power‑save, forced‑frequency, or external‑clock synchronization.
Typical applications include wireless handsets, digital cameras, portable audio players, miniature hard‑disk power supplies and USB‑powered devices. The device includes over‑temperature, short‑circuit, and undervoltage lockout protection, and can operate in both boost and buck‑boost configurations with a quiescent current as low as 38 pA.
| Input Voltage Range | 2.3 V – 5.5 V |
|---|---|
| Output Voltage Range | 2.8 V – 5.0 V |
| Switch Current Limit | ADP2503 1.4 A, ADP2504 2.0 A |
| Oscillator Frequency | 2.1 MHz – 2.9 MHz |
| Sync Clock Frequency | 2.2 MHz – 2.8 MHz |
| EN/SYNC Input High Threshold | 1.2 V |
| Thermal Shutdown Threshold | 150 °C |
| Package | 10‑lead LFCSP (3 mm × 3 mm) |
The converters include over‑temperature shutdown, short‑circuit protection, and undervoltage lockout to prevent deep battery discharge.