The MAX4836/MAX4837 family of low-dropout (LDO) linear regulators feature an accurate current-limiting switch with an integrated FLAG or RESET function. These devices operate from 2.5V to 5.5V and deliver up to 500mA of load current at a preset output voltage. Preset output voltage levels are 1.8V/2.5V/2.8V/3.0V/3.3V. The MAX4836/MAX4837 offer a programmable soft- start control function to eliminate false reset during startup. The MAX4836 provides a FLAG function to noti- fy the system when the load current exceeds the limit. The MAX4837 provides a RESET function to notify the system when the output drops below the threshold. Additionally, reverse-current protection prevents cur- rent flowing from the output to the input. Other features include a low 90µA quiescent current, a 0.1µA shut- down current. The MAX4836/MAX4837 are available in space-saving 6-pin SOT23 and TDFN packages. Each device is speci- fied over the -40°C to +85°C extended temperature range. Contact factory for other programmed output volt- age versions from 1.5V to 3.3V in 100mV increments. For pin-compatible 100mA versions of this device, refer to the MAX4832/MAX4833. For pin-compatible 250mA versions of this device, refer to the MAX4834/MAX4835.
The MAX4836 and MAX4837 are ultra‑low quiescent current, low‑dropout linear regulators that deliver up to 500 mA of load current. They operate from 2.5 V to 5.5 V input and provide preset output voltages of 1.8 V, 2.5 V, 2.8 V, 3.0 V or 3.3 V. The MAX4836 includes a FLAG output, while the MAX4837 provides a RESET output for over‑current or undervoltage protection.
Both devices are offered in 6‑pin SOT‑23 and TDFN packages, support a -40 °C to +85 °C temperature range, and feature programmable soft‑start, reverse‑current protection, and very low shutdown currents (0.1 pA). Detailed electrical characteristics, pin descriptions, and typical performance graphs are provided in the datasheet.
| Maximum Load Current | 500 mA |
|---|---|
| Supply Voltage Range | 2.5 V to 5.5 V |
| Preset Output Voltages | 1.8 V, 2.5 V, 2.8 V, 3.0 V, 3.3 V |
| Shutdown Current | 0.1 pA |
| Operating Temperature Range | -40 °C to +85 °C |
| Thermal‑Shutdown Temperature | +165 °C |
The shutdown current is specified as 0.1 pA.
The devices can be programmed for 1.8 V, 2.5 V, 2.8 V, 3.0 V, or 3.3 V output.
Both parts are available in 6‑pin SOT‑23 and TDFN packages.
Each regulator can supply up to 500 mA of load current.