ACTIVE
Part Number
UM3503
Description
1A, Intergrated Inductor and capacitor, Low Profile Power Module
Status
ACTIVE
Topology
Sync Buck
Iout(Max) (A)
1
Vin(Min) (V)
2.5
Vin(Max) (V)
5.5
Vout (Min) (V)
1
Vout (Max) (V)
5
Control mode
PWM / PSM
Switching Frequency (MHz)
2.25
Max Efficiency(%)
90
Features
Low Quiescent Current, Mode Selection, Excellent Load Transient and Line Transient, Thermal Fault Protection
Operating Temperature Range (℃)
-40 to 85
Package
QFN24 4.0x4.0
The UM3503QA is a complete 1A, DC/DC step-down power supply intended for low-power applications. It is capable of delivering 1A output current over a wide input voltage range from 2.5V to 5.5V. Switching regulator, inductor and input/output capacitors are integrated into a tiny 4mm×4mm×1.05mm QFN package. Unless the external resistor divider, no additional components are required to accomplish the design. The UM3503QA is engineered to simplify design and to minimize layout constraints. It is ideal replacement of discrete buck converter to save PCB space.
The UM3503QA is based on a synchronous step-down DC-DC converter optimized for battery-powered portable applications. The DC/DC converter enters the pulse skipping mode automatically at light load condition. This can increase efficiency. The operation frequency is set to 2.25MHz at normal load condition. The UM3503QA enters shutdown mode and consumes less than 1礎 when EN pin is pulled low.
The UM3503QA is available in a compact and low profile QFN24 4.0mm×4.0mm×1.05mm package.
- Ultra Small QFN Package 4.0×4.0×1.05
- High Efficiency: Up to 90%
- 1A Output Current
- 0.6V Minimum Output Voltage
- 2.5V to 5.5V Input Voltage Range
- 2.25MHz Switching Frequency
- 56μA Quiescent Current
- <1µA Shutdown Current
- Excellent Load Transient and Line Transient
- Pulse Skipping Mode Operation
- Low Ripple at Light-Load Pulse Skipping Mode
- Thermal Fault Protection
- LDO Replacement
- FPGA and DSP Point-of-Load Regulator
- Cellular and Smart Phones
- MCU, DSP and FPGA Core Supplies
- Wireless and DSL Modems
- Portable Game Consoles and Instruments
- PDAs, GPS
- Bluetooth Headsets
- Battery-Powered Devices
| Part Number | Packaging Type | Marking Code | Shipping Qty |
|---|---|---|---|
| UM3503QA | QFN24 4.0×4.0 | 3503 | 3000pcs/13Inch Tape & Reel |
