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RT9742CGJ5
PWR SWITCH N-CHAN 2A 55MΩ TSOT23-5
Richtek USA Inc.
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Design a Custom BoardAbout This Component
High-side N-MOSFET power switch IC for USB applications with 2A current rating and 55mΩ typical on-resistance. Integrates over-current protection, thermal shutdown, under-voltage lockout, and fold-back circuit protection. Features deglitched fault flag output and embedded inrush-current delay, operating from 2.7V to 6V supply.
Package: TSOT-23-5 · 5 pins
Why does this need a breakout?
This 0.95 mm pitch SMD package is incompatible with breadboards and difficult to hand-solder. A breakout board brings the five pins to standard 0.1″ spacing, enabling rapid prototyping without reflow equipment. Essential for evaluating precision analog ICs like current-sense amplifiers in development circuits.
Specifications
ELECTRICAL CHARACTERISTICS
| Manufacturer | Richtek USA Inc. |
| Part Number | RT9742CGJ5 |
| Package | TSOT-23-5 |
| Pin Count | 5 |
| Current - Output (Max) | 2A |
| Input Type | Non-Inverting |
| Interface | On/Off |
| Number of Outputs | 1 |
| Output Configuration | High Side |
| Output Type | N-Channel |
| Rds On (Typ) | 70mOhm |
| Voltage - Load | 2.7V ~ 6V |
| Voltage - Supply (Vcc/Vdd) |
What's Included
BILL OF MATERIALS
- 1x RT9742CGJ5 soldered onto breakout PCB
- Pin headers pre-soldered (2.54mm / 0.1" pitch)
- All IC pins broken out to 2.54mm headers
Breakout Board Design
PCB SPECIFICATIONS
WIDTH
< 0.9" (straddles breadboard)
PITCH
2.54mm standard
SOLDER
Lead-free, reflow assembled
FINISH
FR4, lead-free HASL