CM9107 Datasheet, PDF (1/10 Pages) California Micro Devices Corp – Triple-Output LDO for WLAN

PRELIMINARY
Triple-Output LDO for WLAN
CM9107
Features
• 3.0V to 3.6V input voltage range
• Preset output voltage with excellent line and load
regulation
• LDO1 = 1.80V/500mA, ±1.5% max load regulation
• LDO2 = 2.84V/300mA, ±1% max load regulation
• LDO3 = 2.84V/200mA, ±1% max load regulation
• Low output noise (<30µVrms for LDO3)
• Low dropout voltage; 135mV (typ.) for LDO2 at
300mA, and 110mV (typ.) for LDO3 at 200mA.
• Low quiescent current, < 600µA typical
• Integrated microprocessor RESET circuit with
adjustable RESET delay (2.5ms per-nF of C_T)
• Logic controlled shutdown
• Power good signal
• Built-in power up and power down sequence con­
trol between LDO1 and LDO2
• Over-temperature and over-current protection
• TQFN-16, RoHS compliant lead-free package
Applications
• Wireless LAN 802.11 chipset power supply
• Wireless LAN cards
• Wireless instrumentation
Product Description
The CM9107 is a triple-output, low noise, low dropout
(LDO) linear regulator with an integrated microproces­
sor reset circuit. It is designed for use with wireless
local-area network chipsets. It has an input voltage
range of 3.0V to 3.6V, and supplies a 500mA, 1.80V
preset output (LDO1); a 300mA, 2.84V output (LDO2),
and a 200mA, low noise output of 2.84V (LDO3). The
CM9107 has excellent line and load regulation over the
operating temperature range.
The CM9107 LDOs features low dropout voltage by
using efficient P-channel MOSFETs for each output. It
also features a power good signal (active high) when
all three LDOs are in regulation. It provides two shut­
down control pins, LDO1 and LDO2 power sequencing,
plus short-circuit and over-temperature shutdown pro­
tection.
The CM9107 also provides a microprocessor RESET
circuit with RST and RST outputs. The RESET signal
is asserted when the V_IN supply voltage drops below
2.63V, remaining asserted for the adjustable RESET
delay period, controlled by an external capacitor on the
CT pin.
The CM9107 is packaged in a 16-pin TQFN (4mm x
4mm) package. It can operate over the industrial tem­
perature range of –40°C to 85°C.
Typical Application
3.0Vto3.6V
10uF
C_IN
1615
14 13
0.01uF
1_RST
2 _CT
C_T3SHDN
CM9107
4_SHDN3
12
VO1
11
CB1
10
VO2
CC2 9
5
6 78
1.8V,500mA_Baseband
Processor/
Co1
3.3uF
MAC
2.84V,300mA_Analog
Circuitry
C_o2
3.3uF
C_b
0.033uF
2.84V,200mA
C_o3
3.3uF
VCO
© 2006 California Micro Devices Corp. All rights reserved.
07/11/06 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 lTel: [phone] lFax: [phone] lwww.cmd.com
1