Overview
The TPS61236P from Texas Instruments is a high-current, high-efficiency synchronous boost converter designed for single-cell Li-Ion and Li-polymer battery-powered products. This device is particularly suited for a wide range of portable devices, including power banks, battery backup units, and tablet PCs. It integrates 14-mΩ/14-mΩ power switches and can deliver up to 3.5-A output current for 3.3-V to 5-V conversion with up to 97% efficiency. The TPS61236P features a programmable constant output current, output current monitor, and various protection mechanisms such as soft start, current limit, over voltage, and over thermal protections.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage (VIN) | 2.3 | - | VOUT - 0.6 | V |
| Output Voltage (VOUT) | 2.9 | - | 5.5 | V |
| Output Current (IOUT) | - | - | 3.5 | A |
| Switching Frequency (fsw) | 750 | 1000 | 1250 | kHz |
| High Side MOSFET On Resistance | 14 | - | 30 | mΩ |
| Low Side MOSFET On Resistance | 14 | - | 30 | mΩ |
| Quiescent Current (IQ) | 5 | 11 | - | µA |
| Shutdown Current (ISD) | 0.01 | - | 3 | µA |
| Thermal Shutdown Threshold (TSD) | - | - | 140 | °C |
| Package | - | - | VQFN (9-pin), 2.5 mm x 2.5 mm | - |
Key Features
- Up to 97% efficiency synchronous boost converter
- Up to 3.5-A output current for 3.3-V to 5-V conversion
- 10-A 14-mΩ/14-mΩ internal power switches
- Programmable constant output current
- Output current monitor
- 10-µA quiescent current under light load condition
- Boost status indication
- True disconnection during shutdown
- Adjustable output voltage from 2.9-V to 5.5 V
- 1-MHz switching frequency
- Soft start, current limit, over voltage, and over thermal protections
- Load status indication via INACT pin
Applications
- Power banks and battery backup units
- USB charging ports and USB Type-C applications
- Battery-powered USB hubs
- Tablet PCs and other portable devices
- Battery-powered products
Q & A
- What is the maximum output current of the TPS61236P?
The TPS61236P can deliver up to 3.5-A output current.
- What is the switching frequency of the TPS61236P?
The switching frequency is typically 1 MHz.
- How efficient is the TPS61236P?
The device achieves up to 97% efficiency.
- What is the quiescent current under light load conditions?
The quiescent current is 10 µA under light load conditions.
- Can the output voltage be adjusted?
Yes, the output voltage is adjustable from 2.9 V to 5.5 V.
- What protection mechanisms are built into the TPS61236P?
The device includes soft start, current limit, over voltage, and over thermal protections.
- How does the load status indication work?
The load status is indicated via the INACT pin, which outputs high impedance under inactive status and low logic under active status.
- What is the package type and size of the TPS61236P?
The device is available in a 9-pin VQFN package with a size of 2.5 mm x 2.5 mm.
- What are the typical applications of the TPS61236P?
Typical applications include power banks, battery backup units, USB charging ports, tablet PCs, and other battery-powered products.
- How does the constant output current feature work?
The constant output current is programmed via the CC pin, and the device monitors the CC pin voltage to regulate the output current to a set value.
