Features
- 7V to 40V input supply range
- Up to 300mA output current
- IQ = 4μA at 40V, at no load conditions, switching
- IQ = 2.5μA at 40V at no load and no switching conditions
- Fixed 3.3V VOUT
- Minimum on-time of 75ns
- Variable frequency operation, frequency programmed by external inductor (4.7μH to 15μH)
- Pre-bias, monotonic, and smooth start-up
- Protections: Overcurrent (OC) Limit, input Undervoltage Lockout (UVLO), Over-Temperature Protection (OTP), output Overvoltage Protection (OVP)
- Accurate EN threshold
- Package: TSOT23-5 (2.9 mm × 1.63 mm)
Description
The RAA211403 is a tiny, easy-to-use, ultra-low quiescent current (IQ) buck regulators with wide input voltage range of 7V to 40V, up to 300mA output current with fixed 3.3V output.
The device offers comprehensive protections, including VIN UVLO, VOUT OVP, overcurrent, and over-temperature protections.
The device comes in a TSOT23-5 package.
Parameters
| Attributes | Value |
|---|---|
| Topology [Rail 1] | Buck |
| Outputs (#) | 1 |
| Input Voltage (Min) [Rail 1] (V) | 7 |
| Input Voltage (Max) [Rail 1] (V) | 40 - 40 |
| Output Voltage (Min) [Rail 1] (V) | 3.3 |
| Output Voltage (Max) [Rail 1] (V) | 3.3 |
| Output Current (Max) [Rail 1] (A) | 0.3 |
| Switching Frequency Range (Typical) (kHz) | 210 - 210 |
| Control Type | Peak Current Mode |
| Peak Efficiency (%) | 70 |
| IQ [Rail 1] (µA) | 4 |
| SYNCH Capability | No |
| Qualification Level | Standard |
| Temp. Range (°C) | -40 to +125°C |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| TSOT | 2.9 x 1.6 x 0.85 | 5 | 1 |
Applications
- General purpose or LDO replacement
- Industrial power supplies
- Embedded systems and I/O supplies
- E-Bikes, Power tools
- Home/Industrial Automation
Renesas Boards & Kits
RAA211403 Buck Evaluation Board with 7V to 40V Input Range, Fixed 3.3V 300mA Output
The RTKA211403DE0000BU and RTKA211405DE0000BU boards are used to evaluate the RAA211403 and RAA211405 respectively. They are DC/DC ultra-low Iq (5µA and below), 7V to 40V input standard buck regulators with 300mA of continuous load capability at either fixed 3.3V or 5V output.
Support Communities
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RAA2114034GP3#JA0
Good morning I'm using this component on my board. I find a ripple too high, so i ask you how can i do for reduce it. I connected one more electrolytic capacitor 47uF, it works, but not much.
Aug 26, 2025
Support Communities
