500mA, Low Voltage, LDO Regulator with External Bias Supply

RT9041A/RT9041B

The RT9041A/B are low voltage, low dropout linear regulators with an external bias supply input. The bias supply drives the gate of the internal N-Channel pass transistor, making these devices ideal for applications that require low voltage outputs from low voltage inputs. RT9041A and RT9041B provide the fixed version from 1V to 2V with 0.1V increment. Besides, RT9041B provides more feature by using external resistors as adjustable output voltage. The RT9041A/B include a current limit and thermal shutdown that protects the regulator in the event of a fault condition. The RT9041A/B is available in a SOT-23-6 package.

Applications

Notebook Computers
VID Power Supplies
PDAs
Cell Phones
Low Dropout Regulators with External Bias Supply

Key Spec.

	RT9041A	RT9041B
Status	Active	Active
Vin (min) (V)	1	1
Vin (max) (V)	5.5	5.5
Vout (min) (V)	1	0.8
Vout (max) (V)	2	2.5
Output Adj. Method	Fixed	Fixed;Resistor
Accuracy (+/- %)	2	2
Iout (max) (mA)	500	500
Iq (typ) (uA)	160	160
Vdropout @ rated current (typ) (mV)	300 @ 0.5A	300 @ 0.5A
Cout Type	Ceramic	Ceramic
Features	Enable Input;OCP;Power Good;Stable with Ceramic Capacitor	Enable Input;OCP;Stable with Ceramic Capacitor
Package Type	SOT-26	SOT-26

Features

±2% Output Voltage Accuracy
No Minimum Load Current Required
1V to 5.5V Input Supply Voltage
3V to 5.5V Input Bias Supply Voltage
PGOOD Open-Drain Output (RT9041A)
Support both Fixed/Adjustable Mode (RT9041B)
Low Supply Current
5μA (max) Shutdown Supply Current
RoHS Compliant and Halogen Free

Datasheet

DS9041AB-05.pdf

Datasheet

DS9041AB-05.pdf