The LTC3200/LTC3200-5 are low noise, constant frequency switched capacitor voltage doublers. They are ideally suited for small, battery-powered applications and have features such as low external parts count, constant switching frequency, low output and input ripple, thermal shutdown capability, soft-start circuitry, and low quiescent current in shutdown mode.
The LTC3200 and LTC3200‑5 are low‑noise, constant‑frequency switched‑capacitor charge‑pump voltage doublers. They regulate a 5 V output (adjustable on the LTC3200) from a 2.7 V to 4.5 V input while delivering up to 100 mA of load current. The devices use a minimal external parts count—one flying capacitor and two bypass capacitors—and feature built‑in soft‑start, thermal shutdown, and low‑current shutdown.
Typical applications include white‑LED backlighting, Li‑Ion battery backup, local 3‑5 V conversion, smart‑card readers, and PCMCIA supplies. The LTC3200 is offered in an 8‑pin MSOP package, while the LTC3200‑5 uses a 6‑pin ThinSOT package, both supporting high switching frequencies (≈2 MHz) for compact ceramic capacitor implementations.
| Input Voltage Range | 2.7 V to 4.5 V |
|---|---|
| Output Voltage (adjustable) | 5 V (fixed) or adjustable |
| Maximum Output Current | 100 mA |
| Switching Frequency | ≈2 MHz |
| Shutdown Current (SHDN) | ≈1 mA |
| Thermal Shutdown Temperature | ≈160 °C |
| Package Types | 8‑pin MSOP (LTC3200) and 6‑pin ThinSOT (LTC3200‑5) |
The LTC3200 operates with an input voltage from 2.7 V to 4.5 V.
The LTC3200‑5 can deliver up to 100 mA of output current.
Both parts use a typical switching frequency of about 2 MHz.
In shutdown the device draws roughly 1 mA of current.