RT9011

Portable Power Management 300mA Dual LDO Regulator

General Description

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 3.6V by operating from 2.5V to 5.5V input.

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.

RT9011 is short circuit thermal folded back protected. RT9011 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.

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

Features

• 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 8-Lead WDFN Package

• RoHS Compliant and 100% Lead (Pb)-Free

Applications

• CDMA/GSM Cellular Handsets

• Battery-Powered Equipment

• Laptop, Palmtops, Notebook Computers

• Hand-Held Instruments

• PCMCIA Cards

• Portable Information Appliances

Ordering Information

Pin Configurations

Absolute Maximum Ratings (Note 1)

Supply Input Voltage---------------------------------------------------------------------------------------------- 6V

Other I/O Pin Voltages ------------------------------------------------------------------------------------------- 6V

Power Dissipation, P_D @ T_A = 25°C

TSOT23-6 ------------------------------------------------------------------------------------------------ 0.455W

WDFN-6L 2x2 -------------------------------------------------------------------------------------------- 0.606W

Package Thermal Resistance (Note 4)

TSOT23-6, θ_JA ----------------------------------------------------------------------------------------- 220°C/W

WDFN-6L 2x2, θ_JA ------------------------------------------------------------------------------------- 165°C/W

Lead Temperature (Soldering, 10 sec.)------------------------------------------------------------------- 260°C

Storage Temperature Range ------------------------------------------------------------------- −65°C to 150°C

ESD Susceptibility (Note 2)

HBM (Human Body Mode) ---------------------------------------------------------------------------------- 2kV

MM (Machine Mode) ---------------------------------------------------------------------------------------- 200V

Recommended Operating Conditions (Note 3)

Supply Input Voltage--------------------------------------------------------------------------------- 2.5V to 5.5V

Enable Input Voltage----------------------------------------------------------------------------------- 0V to 5.5V

Junction Temperature Range------------------------------------------------------------------ −40°C to 125°C Ambient Temperature Range-------------------------------------------------------------------- −40°C to 85°C

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