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Semtech Corporation

SC900 Datasheet Preview

SC900 Datasheet

Programmable Penta ULDO

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POWER MANAGEMENT
Description
The SC900 is a highly integrated power management
device for low power portable applications. The device
contains five adjustable low-dropout linear regulators
(LDOs) with CMOS pass-devices as well as a band-gap
reference, I2C interface, and DACs to control the output
voltages.
Many features of the SC900 are programmable through
www.DatatShheeeIt42CU.cionmterface. These include the ability to indepen-
dently turn on any combination of the five regulators. All
five of the LDO output voltages are programmable in
50mV steps from 1.45V to 3.00V. Each LDO can have
an active shutdown or nonactive shutdown program op-
tion through the interface. There is also a reset monitor
flag that is associated with LDOA. In addition, the device
has a separate programmable power-good monitor flag
that activates when one or more LDOs go out of regula-
tion.
SC900
Programmable Penta ULDO with
RESET and I2C Interface
Features
! Five LDO regulators in one package
! I2C interface with multiple device capability
! Independent I2C enable/disable of LDOs
! Independent I2C control of output voltages
! Low thermal impedance of 40°C per watt
! 150mV dropout at 150mA
! Input range from 2.7V to 5.5V
! Programmable power-good flag
! Minimal number of external components
! Over temperature protection
! Small 4mm x 4mm 20-lead MLPQ package
! Small input/output filter capacitors
! Programmable VOUT range - 1.45V to 3.00V for
each LDO
The SC900 offers significant quiescent current and space
savings to the system designer by sharing reference and
biasing among five LDOs. The small and thermally effi-
cient 20-lead MLPQ package make it ideal for use in por-
table products where minimizing layout area is critical.
Typical Application Circuit
Applications
! Palmtop/Laptop computers
! Personal Digital Assistants
! Cellular telephones
! Battery-powered equipment
! High efficiency linear power supplies
4.7µF
VBAT
SC900
VIN
INA
INB
INCD
INE
EN
LDOPGD
ARST
SDA
SCL
A0
GND
LDOE
LDOD
LDOA
LDOB
LDOC
VREF
VASEL
DGND
2.2µF 2.2µF 2.2µF
0.1µF
Keypad
Baseband
Processor
Audio
Processing
Digital Interface
2.2µF
Receiver
Section
TXCO
&
Synthesizer
Transmitter
Section
2.2µF
LNA
PA
March 29, 2005
1 www.semtech.com




Semtech Corporation

SC900 Datasheet Preview

SC900 Datasheet

Programmable Penta ULDO

No Preview Available !

SC900
POWER MANAGEMENT
Absolute Maximum Ratings
Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters
specified in the Electrical Characteristics section is not implied.
Parameter
Symbol
Maximum
Units
Input Supply Voltage
Digital Input Voltage
Operating Ambient Temperature Range
Operating Junction Temperature Range
www.DataSPheeeat4kUI.RcomReflow Temperature
Storage Temperature
Thermal Resistance Junction to Ambient
*1 Square inch, 2 ounce copper.
VIN
VDIG
TA
TJ
TLEAD
TSTG
θJA
-0.3 to +7
-0.3 to VIN+0.3
-40 to +85
-40 to +125
260
-60 to +150
* 40
V
V
°C
°C
°C
°C
°C/W
Electrical Characteristics
Unless otherwise noted: VIN = 3.7V, EN = VIN, TA = -40 to 85°C. Typical values are at TA = +25°C.
Parameter
Symbol
Condition
General
Supply Voltage
Quiescent Current Shutdown
Supply Bypass Capacitor
Digital Inputs
VIN
IQ-SHUTDOWN
CVCC
All outputs < VIN - dropout
Per input pin
Digital Input Voltage
Digital Input Current
Digital Outputs
VIL
VIH
IDIG
Digital Output Voltage(1)
VOL ISINK = 1.2mA, VLDOB 1.8V
VOH ISOURCE = 0.5mA, VLDOB 1.8V
Reference and Biasing Circuitry
Quiescent Current Reference
Reference Voltage
VREF Start-up Time
IQ-REF
VREF
tVREF
CVREF= 100nF
Min Typ Max Units
2.7 5.5 V
10 µA
1 µF
0.4 V
1.6 V
-0.2 0.2 µA
2 10 %
LDOB
90 98
%
LDOB
25
1.227
15
µA
V
ms
2005 Semtech Corp.
2
www.semtech.com


Part Number SC900
Description Programmable Penta ULDO
Maker Semtech Corporation
PDF Download

SC900 Datasheet PDF





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