The LM3352 is a switched capacitor DC/DC converter from National Semiconductor. It can convert an input voltage from 2.5V to 5.5V to a stable output voltage of 2.5V, 3.0V or 3.3V, with a maximum output current of 200mA and an average efficiency of greater than 80%. The switching frequency is 1MHz. The device is available in a 16-pin TSSOP package, with low operating and standby current, making it ideal for portable and handheld applications.
The LM3352 is a CMOS switched‑capacitor DC/DC converter that can step up (boost) or step down (buck) an input voltage of 2.5 V to 5.5 V, providing regulated output voltages from 1.8 V to 4.0 V. It is offered in three standard output versions (2.5 V, 3.0 V, 3.3 V) and can be customized between 1.8 V and 4.0 V. The device is supplied in a 16‑pin TSSOP package with a height of only 1.1 mm.
Typical applications include battery‑powered handheld equipment such as PDAs, cellular phones, flat‑panel displays, and other portable instruments. Key features are high efficiency (>80 %), low quiescent current (400 µA typical, 2.5 µA shutdown), a 1 MHz switching frequency, and minimal external component count, making it suitable for compact, low‑cost designs.
| Input Voltage Range | 2.5 V to 5.5 V |
|---|---|
| Output Voltage Range | 1.8 V to 4.0 V |
| Maximum Output Current | 200 mA |
| Typical Efficiency | >80 % |
| Switching Frequency | 1 MHz (typical) |
| Typical Operating Current | 400 µA |
| Package | 16‑pin TSSOP |
The LM3352 operates with an input voltage between 2.5 V and 5.5 V.
The device can supply up to 200 mA of load current under the specified conditions.
The LM3352 achieves an average efficiency greater than 80 %.
It is available in a 16‑pin TSSOP package.