LTC1733 is a single-chip lithium-ion battery constant-current/constant-voltage linear charger with an on-chip power MOSFET. Internal thermal feedback regulates the charge current to limit die temperature during high power operation or high ambient temperature conditions. No external current sense resistor is needed and no blocking diode is required due to the internal MOSFET architecture. The charge current and charge time can be set externally with a single resistor and capacitor.
The LTC1733 is a monolithic linear lithium‑ion battery charger that integrates an internal power MOSFET, eliminating the need for external MOSFETs, sense resistors, or blocking diodes. It provides programmable charge current up to 1.5 A, thermal regulation, and status outputs for charge, fault, and power‑supply conditions. The device is offered in a 10‑lead plastic MSOP (MSE) package.
The document includes absolute maximum ratings, electrical characteristics, typical performance curves, pin function descriptions, operation guidelines, and package dimensions. It also lists typical applications such as cellular phones, handheld computers, digital cameras, and charging docks.
| Storage Temperature Range | -65 °C to 150 °C |
|---|---|
| Supply Voltage (Vee) | 4.5 V to 6.5 V |
The LTC1733 can deliver up to 1.5 A of charge current.
No external MOSFET, sense resistor, or blocking diode is required because the device includes an internal power MOSFET.
The LTC1733 is supplied in a 10‑lead plastic MSOP (MSE) package.
A capacitor connected to the TIMER pin sets the timer period according to Time (Hours) = (Cryer × 3 hr) / 0.1 µF.