The LM3242 datasheet details a 6 MHz, 750 mA, adjustable step‑down DC‑DC converter optimized for RF power amplifiers.
The LM3242 is a step‑down DC‑DC converter designed for RF power‑amplifier applications powered by a single‑cell lithium‑ion battery. It operates from 2.7 V to 5.5 V input and provides an adjustable 0.4 V‑3.6 V output with automatic ECO/PWM/BP mode switching, over‑current and thermal protection, and a low‑power sleep mode.
The datasheet includes absolute maximum ratings, recommended operating conditions, electrical and system characteristics, timing requirements, and typical performance curves. Package information for the 9‑pin DSBGA (YFQ) is also provided. This manual is written in Chinese.
| Input voltage range | 2.7 V – 5.5 V |
|---|---|
| Output voltage range | 0.4 V – 3.6 V (adjustable) |
| Maximum load current (PWM mode) | 750 mA |
| Maximum load current (Bypass mode) | 1 A |
| Switching frequency (typical) | 6 MHz |
| Typical efficiency (PWM, 500 mA, 3.3 VOUT) | 95 % |
| Package dimensions (DSBGA YFQ) | 1.51 mm × 1.385 mm |
The device operates from 2.7 V to 5.5 V input.
It can supply up to 750 mA in PWM mode and up to 1 A in bypass mode.
The typical switching frequency is 6 MHz.
The 9‑pin DSBGA (YFQ) package measures 1.51 mm × 1.385 mm.