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Penta ULDO. SC900A Datasheet

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Penta ULDO. SC900A Datasheet






SC900A ULDO. Datasheet pdf. Equivalent




SC900A ULDO. Datasheet pdf. Equivalent





Part

SC900A

Description

Programmable Penta ULDO



Feature


Programmable Penta ULDO www.DataSheet4U. com with RESET and I2C Interface POWER MANAGEMENT Description The SC900A is a highly integrated power management devi ce for low power portable applications. The device contains five adjustable l ow-dropout linear regulators (LDOs) wit h CMOS pass-devices as well as a band-g ap reference, I2C interface, and DACs t o control the output.
Manufacture

Semtech

Datasheet
Download SC900A Datasheet


Semtech SC900A

SC900A; voltages. Many features of the SC900A a re programmable through the I2C interfa ce. These include the ability to indepe ndently turn on any combination of the five regulators. All five of the LDO output voltages are programmable in 50m V steps from 1.45V to 3.00V for LDOs A and B, and from 1.75V to 3.30V for LDOs C, D and E. Each LDO can have an activ e shutdown or nonactiv.


Semtech SC900A

e shutdown program option through the in terface. There is also a reset monitor flag that is associated with LDOA. In addition, the device has a separate pro grammable power good monitor flag that activates when one or more LDOs go out of regulation. The SC900A offers signi ficant quiescent current and space sav ings to the system designer by sharing reference and biasing am.


Semtech SC900A

ong five LDOs. The small and thermally efficient 20-lead MLPQ package make it ideal for use in portable products whe re minimizing layout area is critical. SC900A Features ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ Five LDO regulators i n one package I2C interface with multip le device capability Independent I2C en able/disable of LDOs Independent I2C co ntrol of output voltages Low therma.

Part

SC900A

Description

Programmable Penta ULDO



Feature


Programmable Penta ULDO www.DataSheet4U. com with RESET and I2C Interface POWER MANAGEMENT Description The SC900A is a highly integrated power management devi ce for low power portable applications. The device contains five adjustable l ow-dropout linear regulators (LDOs) wit h CMOS pass-devices as well as a band-g ap reference, I2C interface, and DACs t o control the output.
Manufacture

Semtech

Datasheet
Download SC900A Datasheet




 SC900A
POWER MANAGEMENT
Description
SC900A
Programmable Penta ULDO
with RESET anwdwwI.D2aCtaSIhneette4Ur.cfoamce
Features
The SC900A is a highly integrated power management de-
vice for low power portable applications. The device con-
tains ve 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 SC900A are programmable through
the I2C interface. These include the ability to independent-
ly turn on any combination of the ve regulators. All ve
of the LDO output voltages are programmable in 50mV
steps from 1.45V to 3.00V for LDOs A and B, and from
1.75V to 3.30V for LDOs C, D and E. Each LDO can have
an active shutdown or nonactive shutdown program op-
tion through the interface. There is also a reset monitor
ag that is associated with LDOA. In addition, the device
has a separate programmable power good monitor ag
that activates when one or more LDOs go out of regula-
tion.
The SC900A offers signicant quiescent current and
space savings to the system designer by sharing refer-
ence and biasing among ve LDOs. The small and ther-
mally efcient 20-lead MLPQ package make it ideal for
use in portable products where minimizing layout area is
critical.
‹ 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 ag
‹ Minimal number of external components
‹ Over temperature protection
‹ Small 4mm x 4mm 20-lead MLPQ package
‹ Small input/output lter capacitors
‹ Programmable VOUT range -
1.45V to 3.00V for LDOs A and B
1.75V to 3.30V for LDOs C, D and E
Applications
‹ Palmtop/Laptop computers
‹ Personal Digital Assistants
‹ Cellular telephones
‹ Battery-powered equipment
‹ High efciency linear power supplies
Typical Application Circuit
+
-
VBAT
4.7uF
SC900A
VIN
INA
INB
INCD
INE
EN
LDOPGD
ARST
SDA
SCL
A0
GND
LDOE
LDOD
LDOA
LDOB
LDOC
VREF
VASEL
DGND
2.2uF 2.2uF 2.2uF
0.1uF
Keypad
Baseband
Processor
Audio
Processing
Digital
Interface
2.2uF
2.2uF
Receiver
Section
LNA
TCXO
&
Synthesiser
Transmitter
Section
PA
Camera
Processing
CCD
November 14, 2005
1
www.semtech.com




 SC900A
SC900A
POWER MANAGEMENT
www.DataSheet4U.com
Absolute Maximum Ratings
Exceeding the specications below may result in permanent damage to the device or device malfunction. Operation outside of the parameters specied in the
Electrical Characteristics section is not implied.
Parameter
Symbol
Maximum
Input Supply Voltage
VIN -0.3 to +7
Digital Input Voltage
VDIG -0.3 to VIN +0.3
Operating Ambient Temperature Range
TA -40 to +85
Operating Junction Temperature Range
TJ -40 to +125
Peak IR Flow Temperature
TLEAD
260
Storage Temperature
TSTG
-60 to +150
Thermal Impedance Junction to Ambient(1)
θJA 40
ESD Protection Level(2)
ESD
2
(1) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad as per JESD51 standards.
(2) Tested according to JEDEC standard JESD22-A114-B.
Electrical Characteristics
Unless otherwise noted VIN = 3.7V, TA = -40 to +85°C. Typical values are at TA = +25°C.
Units
V
V
°C
°C
°C
°C
°C/W
kV
Parameter
Symbol
Conditions
Min Typ Max Units
General
Supply Voltage
Quiescent Current Shutdown
Supply Bypass Capacitor
VIN
IQ-SHUTDOWN
CVCC
Digital Inputs
Digital Input Voltage
Digital Input Current
VIL
VIH
IDIG
Digital Outputs
Digital Output Voltage(1)
VOL
VOH
Referencing and Biasing Circuitry
Quiescent Current Reference
Reference Voltage
VREF Start-Up Time
VREF Bypass Capacitor
IQ-REF
VREF
IVREF
CVREF
© 2005 Semtech Corp.
All outputs < VIN - dropout
Per input pin
ISINK= 1.2mA, V 1.8V
ISOURCE = 0.5mA, V 1.8V
CVREF = 100nF
2
2.7
1
1.6
-0.2
2
90 98
25
1.227
15
0.1
5.5 V
10 μA
μF
0.4 V
V
0.2 μA
10 %LDOB
%LDOB
μA
V
ms
μF
www.semtech.com




 SC900A
SC900A
POWER MANAGEMENT
Electrical Characteristics (Cont.)
www.DataSheet4U.com
Parameter
Symbol
Conditions
Min Typ Max Units
LDO Regulators
Quiescent Supply Current
Quiescent Supply Current
at Start-Up
Current Limit
Bypass Capacitor
IQ
IQSUP
ILIM
CBYP
All LDOs active in
default states
190 360
LDO A, B, C active in default states
VOUT + 0.5V < VIN < 5.5V
125
250 410 650
Ceramic, low ESR
2.2
LDO Regulator A (Core Supply)
Output Voltage Accuracy
Output Voltage Accuracy at
2.80V (DAC = 11011)
VOAA
1.45V VOUT 3.00V
VOUT + 0.2V VIN 5.5V
IOUT = 1mA, TA = 25°C
IOUT = 1mA
-3
-2
+3
+2
Output Voltage Accuracy at
1.80V (DAC = 00011)
VOASA
IOUT = 1mA, TA = 25°C
-3
+3
Output Voltage Accuracy at
2.80V (DAC = 11011)
Maximum Output Current
IOMAXA
VOUT + 0.5V VIN 5.5V,
IOUT = 200mA
-3.5
200
+3.5
Default Setting: ON
VOA-HI
VOA-LO
VASEL - High
VASEL - Low
2.80
1.80
Line Regulation at 1.8V, 2.8V LINEREGA IOUT = 1mA, VOUT + 0.2V < VIN < 5.5V
2.5 12
Load Regulation at 1.8V, 2.8V LOADREGA
1mA < IOUT <200mA
-3 -20
Dropout Voltage
Power Supply Rejection Ratio
VDA
PSRRA
Output Voltage Noise(2)
en-A
VOUT = 3.0V, IOUT = 200mA
f = 10Hz - 1kHz, CBYP = 0.1μF,
IOUT = 50mA,
2.5V VOUT 3.0V
f = 10Hz - 100kHz, IOUT = 50mA,
CVREF = 0.1μF, COUT = 2.2μF,
2.5V VOUT 3.0V
200 250
60
45
LDO Regulator B (DIGITAL I/O SUPPLY)
Output Voltage Accuracy
Output Voltage Accuracy at
2.80V (DAC = 11011)
VOAB
VOASB
1.45V VOUT 3.00V
VOUT + 0.15V VIN 5.5V
IOUT = 1mA, TA = 25°C
IOUT = 1mA
VOUT + 0.5V VIN 5.5V,
IOUT = 150mA
-3
-2
-3.5
+3
+2
+3.5
Maximum Output Current
IOMAXB
150
μA
μA
mA
μF
%
%
%
%
mA
V
V
mV
mV
mV
dB
μVRMS
%
%
%
mA
© 2005 Semtech Corp.
3
www.semtech.com






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