Features
- 7V to 80V input supply range
- Up to 300mA output current
- IQ = 5.5μA at 80V, at no load conditions, switching
- IQ = 4.5μA at 80V at no load and no switching conditions
- Fixed 5V VOUT
- Minimum on-time of 75ns
- Variable frequency operation, frequency programmed by external inductor (10μH to 33μH)
- 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 (2.9mm x 1.63mm)
Description
The RAA211805 is a tiny, easy-to-use, ultra-low quiescent current (IQ) buck regulator with a wide input voltage range of 7V to 80V and up to 300mA of output current with a fixed 5V output.
Available in a TSOT23-5 package, the device offers comprehensive protections, including VIN undervoltage lockout (UVLO), VOUT overvoltage protection (OVP), overcurrent protection, and over-temperature protection.
Parameters
| Attributes | Value |
|---|---|
| Topology [Rail 1] | Buck |
| Outputs (#) | 1 |
| Input Voltage (Min) [Rail 1] (V) | 7 |
| Input Voltage (Max) [Rail 1] (V) | 80 - 80 |
| Output Voltage (Min) [Rail 1] (V) | 4.75 |
| Output Voltage (Max) [Rail 1] (V) | 5.15 |
| Output Current (Max) [Rail 1] (A) | 0.3 |
| Switching Frequency Range (Typical) (kHz) | 230 |
| Control Type | Peak Current Mode |
| IQ [Rail 1] (µA) | 5 |
| SYNCH Capability | No |
| Qualification Level | Standard |
| Temp. Range (°C) | -55 to +125°C |
| Simulation Model Available | iSim |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| TSOT | 2.9 x 1.6 x 0.85 | 5 | 1 |
Application Block Diagrams
 | Dual-Needle Gauge Dual-needle gauge displays two real-time values for fast, intuitive analog monitoring. |
Additional Applications
- General-purpose or LDO replacement
- Industrial power supplies
- Embedded systems and I/O supplies
- E-bikes
- power tools
- Home/Industrial automation