Features
- 4.5V to 24V input supply range
- Up to 3A output current
- Integrated high-side (85mΩ) and low-side (45mΩ) MOSFETs
- 1.4MHz switching frequency
- 400μA quiescent current
- Minimum on-time of 66ns
- Minimum off-time of 250ns
- 0.6V reference voltage with 2% accuracy
- PFM mode under light-load condition
- Current mode Constant On-Time (COT) control with internal compensation
- Internal 1.2ms soft-start time
- Protection: Low-Side Overcurrent (LSOC) limit, input Undervoltage Lockout (UVLO), Over-Temperature Protection (OTP), Output Undervoltage Protection (OUVP) with Hiccup Mode
- Accurate EN threshold
- 6 LD TSOT23 package
RAA211233 Typical Application Schematic
Description
The RAA211233 is an integrated 24V, 3A, 1.4MHz synchronous buck regulator with current mode constant on-time (COT) control.
The RAA211233 features comprehensive protection including input undervoltage lockout (UVLO), overcurrent protection (OCP), output undervoltage protection (OUVP), and over-temperature protection (OTP). The device is available in a 6 Ld TSOT23 package.
The device is available in a 6 Ld TSOT23 package.
Parameters
| Attributes | Value |
|---|---|
| Topology [Rail 1] | Buck |
| Outputs (#) | 1 |
| Input Voltage (Min) [Rail 1] (V) | 4.5 |
| Input Voltage (Max) [Rail 1] (V) | 24 - 24 |
| Output Voltage (Min) [Rail 1] (V) | 0.6 |
| Output Voltage (Max) [Rail 1] (V) | 11 |
| Output Current (Max) [Rail 1] (A) | 3 |
| Switching Frequency Range (Typical) (kHz) | 1380 - 1380 |
| Control Type | COT |
| Peak Efficiency (%) | 96 |
| IQ [Rail 1] (µA) | 400 |
| SYNCH Capability | No |
| Qualification Level | Standard |
| Temp. Range (°C) | -55 to +125°C |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| TSOT | 2.9 x 1.6 x 0.87 | 6 | 1 |
Product Comparison
| RAA211233 | RAA211230 | |
| Input Voltage (Min) (V) | 4.5 | 4.5 |
| Output Voltage (Max) (V) | 11 | 14 |
Application Block Diagrams
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Additional Applications
- General purpose
- Industrial power supplies
- Embedded systems and I/O supplies
- Sensor, imaging, and radar
- Instrumentation, medical, audio, and RF power supplies
Complete Your Design
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Renesas Boards & Kits
RTKA211233DE0000BU
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RAA211233 Synchronous Buck Evaluation Board with 4.5V to 24V Input Range, 3A Output (TSOT23-6 version)
The RAA211233 is an integrated 24V, 3A 1.4MHz synchronous buck regulator with constant on-time (COT) current mode control. It supports a wide input voltage range from 4.5V to 24V.
The RTKA211233DE0000BU evaluation board provides a quick and comprehensive platform for evaluating the performance... Read More
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