The TPS6735 is a fixed negative 5-V output inverting dc/dc converter capable of delivering 200 mA from inputs as low as 4.5 V.
The TPS6735 provides a fixed –5 V output at up to 200 mA from input voltages as low as 4 V. It uses a 160 kHz current‑mode PWM controller with a p‑channel MOSFET power switch, offering high efficiency (≈78 %) and low quiescent current (≈1.9 mA). An enable pin allows the device to be shut down when the –5 V output is not required.
The converter is offered in 8‑pin SOIC and DIP packages (including tape‑and‑rewind versions) and operates over a –40 °C to 85 °C free‑air temperature range. Typical external components are an inductor, input and output filter capacitors, a reference filter capacitor, and a Schottky diode. The device includes soft‑start, over‑current protection, and undervoltage lockout features.
| Output voltage | -5 V |
|---|---|
| Output current | 200 mA |
| Supply voltage range | 4 V to 6.2 V |
| Typical efficiency | 78 % |
| Oscillator frequency | 160 kHz |
| Reference voltage | 1.22 V |
| Enable input thresholds | EN > 2 V turns on, EN < 0.4 V turns off |
The device achieves about 78 % typical efficiency.
A logic high (EN > 2 V) turns the converter on, while a low level (EN < 0.4 V) shuts it down and reduces supply current.
The part is offered in 8‑pin SOIC and DIP packages, with the DIP version also available in tape‑and‑rewind form.
It provides a 1.22‑V reference output that can source up to 125 µA.