MP20249
Dual, Ultra-Low Noise, High PSRR
200mA Linear Regulator
MP20249 Rev1.0 www.MonolithicPower.com 1
12/15/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP20249 is a dual-channel, ultra-low noise,
low dropout and high PSRR linear regulator.
Fixed output voltage options are available
between 1.2V to 3.3V with 1% accuracy by
operating from a +2.3V to +6.0V input. It is
designed to deliver up to 200mA of load current
at each channel. Dropout voltage is only 75mV at
full load. The MP20249 uses internal
PMOSFETS as pass elements, which consume
125µA supply current (both LDOs on) at no load
condition. With new innovative design techniques,
the MP20249 can achieve an output voltage
noise as low as 16µVRMS without using a
bypass capacitor at each channel. The MP20249
is designed and optimized to work with small-
value, low-cost ceramic capacitors, making it
ideal for applications with space-constraints. It
typically requires only 1µF of output capacitance
for stability with any load at each channel.
The EN1 and EN2 pins control each output
respectively. When both channels shutdown
simultaneously, the chip is turned off and
consumes nearly zero operation current, which is
suitable for battery-power devices. The MP20249
features current limit and over-temperature
protection.
The MP20249 also has an output discharge
function that controls the quick discharging of the
output capacitor.
It is available in a miniature 6-ball WLCSP
package.
FEATURES
• Input Voltage Range: 2.3V to 6.0V
• Two LDOs in a 1.0x1.5mm WLCSP Package
• Up to 200mA Output Current (Per Channel)
• Dual Enable Pins Control Each Output
• 16µVRMS Output Noise (100Hz-1kHz)
Bandwidth with No Bypass Capacitor
required
• High PSRR: 65dB @ 1kHz
• Low dropout: 60mV @ 150mA Load
• Stable with 1µF Ceramic Capacitor for Any
Load (Per Channel)
• Very Fast Line and Load Transient Response
• Output Discharge Function
• Current Limit and Thermal Protection
APPLICATIONS
• Cellular Mobile Phones
• Digital Cameras
• Handheld and Battery-powered Equipment
• Wireless LAN
• Post DC-to-DC Regulation
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
DAM (Analog Digital Adaptive Modulation), AAM (….) areTrademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
MP20249
EN1
EN2
GND
VIN
VOUT1
VOUT2
1uF
1uF
1uF
A1
A2
B1
B2
C1
C2
VIN=2.3V to 6V
VOUT1=1.2V to 3.3V
VOUT2=1.2V to 3.3V
