Description

The R1170D291B-TR is a positive voltage regulator IC that belongs to the R1170 series. These ICs are fabricated using the CMOS process and have several features such as high ripple rejection, high output voltage accuracy, low dropout voltage, and low power consumption. The IC consists of a voltage reference unit, an error amplifier, resistor net for setting output voltage, a current limit circuit at short mode, a chip enable circuit, and thermal-shunt circuit. The R1170D291B-TR is offered in SOT-89-5 and HSON6 packages, making it suitable for high-density mounting in various power sources for portable appliances.

Specifications and features

• Positive voltage regulator IC with CMOS process
• Output voltage range: 1.5V to 4.0V
• Output current: minimum 800mA (VIN=VOUT+1.0V)
• High output voltage accuracy: ±2.0%
• Low dropout voltage: 0.12V (VOUT=3.0V, IOUT=300mA)
• Low power consumption: Ultra-Low Supply Current, TYP. 80µA; Low Standby Current, TYP. 0.1µA
• Built-in current limit and thermal shunt circuits
• Small SOT-89-5 and HSON6 packages

Application Scenarios

The R1170D291B-TR is suitable for use as a local power source for portable appliances such as notebooks, cameras, videos, and equipment that use batteries. It can also be used as a power source for home appliances.

Comparison

• High ripple rejection
• Small form factor
• High output voltage accuracy
• Low dropout voltage
• Built-in current limit and thermal shunt circuits ensure safe operation

• Output voltage is fixed in the IC