Step-Down Regulator. SC286 Datasheet

SC286 Regulator. Datasheet pdf. Equivalent


Part SC286
Description Dual Channel 4A Synchronous Step-Down Regulator
Feature POWER MANAGEMENT Features  Input Voltage Range — 2.9 to 5.5V  Output Voltage Range — 0.8V to 3.3V .
Manufacture Semtech
Datasheet
Download SC286 Datasheet


POWER MANAGEMENT Features  Input Voltage Range — 2.9 to 5.5 SC286 Datasheet
Recommendation Recommendation Datasheet SC286 Datasheet




SC286
POWER MANAGEMENT
Features
Input Voltage Range — 2.9 to 5.5V
Output Voltage Range — 0.8V to 3.3V
Output Current — up to 4A for each channel
Ultra-Small Footprint — <1mm Height Solution
Switching Frequency — 1.6MHz
Automatic Power Save Mode
Efficiency Up to 95%
Low Output Noise Across Load Range
Excellent Transient Response
Start Up into Pre-Bias Output
Duty-Cycle Low Dropout Operation — 100%
Shutdown Current — <1µA
Externally Programmable Soft Start Time
Power Good indicator
Input Under-Voltage Lockout
Output Over-Voltage, Current Limit Protection
Over-Temperature Protection
Thermally Enhanced 4 x 4 x 0.6 (mm)
MLPQ-UT28 package
Lead-free, Halogen free, and RoHS/WEEE compliant
Applications
Routers and Network Cards
LCD TV
Office Automation
Printers
SC286
Dual Channel 4A Synchronous
Step-Down Regulator
Description
The SC286 is a dual channel 4A synchronous step-down
regulator designed to operate with an input voltage
range of 2.9V to 5.5V. Each channel offers fifteen pre-
determined output voltages via separate control pins
programmable from 0.8 to 3.3 Volts. The control pins
allow for on-the-fly voltage changes, enabling system
designers to implement dynamic power savings. The
device is also capable of adjusting output voltage via an
external resistor divider.
The SC286 is optimized for maximum efficiency over a
wide range of load currents. During full load operation,
the device operates in PWM mode with fixed 1.6MHz
oscillator frequency, allowing the use of small surface
mount external components. As the load decreases, the
regulator will transition into Power Save mode maintain-
ing high efficiency.
Connecting the control pins to logic low forces the device
into shutdown mode reducing the supply current to less
than 1μA. Connecting any of the control pins to logic high
enables the converter and sets the output voltage accord-
ing to Table 1. Other features include under-voltage
lockout, programmable soft-start to limit in-rush current,
power good indicator, over-temperature protection, and
output short circuit protection.
The SC286 is available in a thermally-enhanced, 4 x 4 x 0.6
(mm) MLPQ-UT28 package and has a rated temperature
range of -40 to +85°C.
Typical Application Circuit
VINA
CINA
22µF
RPGOODA
100kΩ
VINB
CINB
22µF
RPGOODB
100kΩ
CTL0A
CTL1A
CTL2A
CTL3A
RAVINA 1Ω
CAVINA0.1µF
RAVINB 1Ω
CAVINB0.1µF
PVINA
LXA
AVINA SC286 VOUTA
AGNDA
PGOODA
PVINB
LXB
VOUTB
SSA
PGNDA
AVINB
AGNDB
PGOODB
CTL0A
CTL1A
CTL2A
CTL3A
SSB
PGNDB
CTL0B
CTL1B
CTL2B
CTL3B
LA 1.0µH
LB 1.0µH
CSSA
1nF
CSSB
1nF
Revision 2.0
© 2011 Semtech Corporation
COUTA
47µF
COUTB
47µF
VOUTA
VOUTB
CTL0B
CTL1B
CTL2B
CTL3B




SC286
Pin Configuration
28 28 26 25 24 23 22
PVINA 1
PVINA 2
AGNDA 3
AVINA 4
CTL0A 5
CTL1A 6
CTL2A 7
8 9 10 11 12 13 14
21 CTL2B
20 CTL1B
19 CTL0B
18 AVINB
17 AGNDB
16 PVINB
15 PVINB
4 x 4 x 0.6 (mm) MLPQ-UT28
θJA = 32.5°C/W; θJC = 7°C/W
Marking Information
SC286
yyww
XXXXX
XXXXX
yyww = Date code
XXXXX = Semtech Lot number
XXXXX = Semtech Lot number
SC286
Ordering Information
Device
Package
SC286ULTRT(1)(2)
4 x 4 x 0.6 (mm) MLPQ-UT28
SC286EVB
Evaluation Board
Notes:
(1) Available in tape and reel only. A reel contains 3,000 devices.
(2) Device is lead-free, Halogen free, and RoHS/WEEE compliant.
Table 1 – Output Voltage Settings for Each Channel
CTL3A/B CTL2A/B CTL1A/V CTL0A/B Output Voltage
0000
Shutdown
0001
0.8
0010
1.00
0011
1.025
0100
1.05
0101
1.20
0110
1.25
0111
1.30
1000
1.50
1001
1.80
1010
2.20
1011
2.50
1100
2.60
1101
2.80
1110
3.00
1111
3.30








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