Portable Power Management 300mA Dual LDO Regulator


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The RT9011 is a dual channel, low noise, and low dropout regulator sourcing up to 300mA at each channel. The range of output voltage is from 1.2V to 3.5V by operating from 2.5V to 5.5V input.

The RT9011 offers 2% accuracy, extremely low dropout voltage (240mV @ 300mA), and extremely low ground current, only 27μA per LDO. The shutdown current is near zero current which is suitable for battery-power devices. Other features include current limiting, over temperature, output short circuit protection.

The RT9011 is short circuit thermal folded back protected. The IC lowers its OTP trip point from 165°C to 110°C when output short circuit occurs (VOUT < 0.4V) providing maximum safety to end users.

The RT9011 can operate stably with very small ceramic output capacitors, reducing required board space and component cost. The RT9011 is available in fixed output voltages in the TSOT-23-6, WDFN-8L 2x2, WDFN-10L 3x3, WDFN-8L 3x3 and WDFN-6L 1.6x1.6 packages.


  • CDMA/GSM Cellular Handsets
  • Battery-Powered Equipment
  • Laptop, Palmtops, Notebook Computers
  • Hand-Held Instruments
  • PCMCIA Cards
  • Portable Information Appliances
Key Spec.
Status Active
Vin (min) (V) 2.5
Vin (max) (V) 5.5
Number of Outputs 2
Vout (min) (V) 1.2
Vout (max) (V) 3.5
Fixed Vout Option (V) 1.2;1.3;1.5;1.6;1.8;1.85;1.9;2.0;2.1;2.5;2.6;2.65;2.7;2.8;2.85;2.9;3.0;3.1;3.15;3.2;3.3;3.5
Output Adj. Method Fixed
Accuracy (+/- %) 2
Iout (max) (A) 0.3
Iq (typ) (mA) 58
Current Limit (typ) (mA) 450
Vdropout@ rated current (typ) (mV) 240 @ 0.3A
Cout (min) (uF) 1
Cout Type Ceramic
Features Enable Input;OCP;SCP
Package Type TSOT-26;WDFN2x2-8;WDFN3x3-8;WDFN1.6x1.6-6;WDFN3x3-10
  • Wide Operating Voltage Ranges : 2.5V to 5.5V
  • Low-Noise for RF Application
  • No Noise Bypass Capacitor Required
  • Fast Response in Line/Load Transient
  • TTL-Logic-Controlled Shutdown Input
  • Low Temperature Coefficient
  • Dual LDO Outputs (300mA/300mA)
  • Ultra-low Quiescent Current 27μA/LDO
  • High Output Accuracy 2%
  • Short Circuit Protection
  • Thermal Shutdown Protection
  • Current Limit Protection
  • Short Circuit Thermal Folded Back Protection
  • Tiny TSOT-23-6 and 6-Lead/8-Lead/10-Lead WDFN Packages
  • RoHS Compliant and 100% Lead (Pb)-Free
TitleLast UpdateShareDownload
Portable Power Management 300mA Dual LDO Regulator2006/03/13
Title Last Update ShareDownload
Portable Power Management 300mA Dual LDO Regulator 2015/05/19