SC417 Regulator Datasheet

SC417 Datasheet, PDF, Equivalent


Part Number

SC417

Description

Integrated FET Regulator

Manufacture

Semtech

Total Page 30 Pages
Datasheet
Download SC417 Datasheet


SC417
SC417/SC427
POWER MANAGEMENT
10A EcoSpeedTM Integrated FET
Regulator with Programmable LDO
Features
Description
Power system:
Input voltage — 3V to 28V
Integrated bootstrap switch
Programmable LDO output — 200mA
1% reference tolerance -40 to +85 °C
Selectable internal/external bias power supply
EcoSpeedTM architecture with pseudo-fixed fre-
quency adaptive on-time control
Logic input/output control
Independent control EN for LDO and switcher
Programmable VIN UVLO threshold
Power good output
Selectable ultrasonic/power save methods
Protections
Over-voltage/under-voltage
TC compensated RDS(ON) sensed current limit
Thermal shutdown
Output capacitor types
High ESR — SP, POSCAP, OSCON
Ceramic capacitors
Package — 5x5mm, 32-pin MLPQ
Lead-free and halogen free
RoHS and WEEE compliant
Applications
The SC417/SC427 is a stand-alone synchronous
EcoSpeedTM buck regulator which incorporates Semtech’s
advanced, patented adaptive on-time control architecture
to provide excellent light-load efficiency and fast transient
response. It features integrated power MOSFETs, a boot-
strap switch, and a programmable LDO in a 5x5mm
package. The device is highly efficient and uses minimal
15x20mm PCB area for a total converter solution. Refer to
page 16 for information on the C-SIM simulation tool.
The SC417/SC427 supports using standard capacitor types
such as electrolytic or special polymer, in addition to
ceramic, at switching frequencies up to 1MHz. The pro-
grammable frequency, synchronous operation, and select-
able power-save provide high efficiency operation over a
wide load range. In power-save mode, the minimum oper-
ating frequency for the SC417 is 25kHz whereas the SC427
has no minimum.
Additional features include internal soft-start, program-
mable cycle-by-cycle over-current limit protection, under
and over-voltage protections and soft shutdown. The
device also provides separate enable inputs for the PWM
controller and LDO as well as a power good output for the
PWM controller.
Office automation and computing
Networking and telecommunication equipment
Point-of-load power supplies and module replacement.
Typical Application Circuit
The wide input voltage range, programmable frequency,
and programmable LDO make the device extremely flexible
and easy to use in a broad range of applications. Support is
provided for single cell or multi-cell battery systems in addi-
tion to traditional DC power supply applications.
E N A B L E /P S A V E
ENABLE LDO
V E X T /L D O
VIN
Rev 2.1
RTON
EN/PSV LXS
ENL ILIM
TON
PGOOD
VOUT
LX
V5V SC417/SC427
R IL IM
1 µF
BST
FB
VIN
CIN LXBST AGND PGND
CBST
© 2015 Semtech Corporation
L1
RFB1
RFB2
PGOOD
VOUT
+ COUT
US Patent: 7,714,547 B2


SC417
SC417/SC427
Pin Configuration
FB
FBL
V5V
AGND
VOUT
V IN
VLDO
BST
32 31 30 29 28 27 26 25
Top View
1 24
2
AGND
3 PAD 1
23
22
4 21
LX
5
PAD 3
20
6
V IN
7 PAD 2
19
18
8 17
9 10 11 12 13 14 15 16
LX
LX
PGND
PGND
PGND
PGND
PGND
PGND
Ordering Information
Device
SC417MLTRC (1)(2)(3)
SC427MLTRC (1)(2)(3)
SC417EVB
SC427EVB
Package
MLPQ-32 5X5
MLPQ-32 5X5
Evaluation Board
Evaluation Board
Notes:
1) Available in tape and reel only. A reel contains 3000 devices.
2) Pb-free, Halogen free, and RoHS/WEEE compliant.
3) Device has copper bond wires.
SC417 and SC427
MLPQ-32; 5x5, 32 LEAD
Marking Information
SC417
yyww #
xxxxxx
xxxxxx
yyww = Date Code
xxxxxx = Semtech Lot Number
xxxxxx = Semtech Lot Number
# = Copper Bond Wire (SC417MLTRC only)
SC427
yyww #
xxxxxx
xxxxxx
yyww = Date Code
xxxxxx = Semtech Lot Number
xxxxxx = Semtech Lot Number
# = Copper Bond Wire (SC427MLTRC only)



Features SC417/SC427 POWER MANAGEMENT 10A EcoSp eedTM Integrated FET Regulator with Pro grammable LDO Features Description Power system: • Input voltage — 3V to 28V • Integrated bootstrap swit ch • Programmable LDO output — 200m A • 1% reference tolerance -40 to +85 °C • Selectable internal/external b ias power supply • EcoSpeedTM archite cture with pseudo-fixed fre- quency ada ptive on-time control  Logic input/o utput control • Independent control E N for LDO and switcher • Programmable VIN UVLO threshold • Power good outp ut • Selectable ultrasonic/power save methods  Protections • Over-volta ge/under-voltage • TC compensated RDS (ON) sensed current limit • Thermal s hutdown  Output capacitor types • High ESR — SP, POSCAP, OSCON • Cera mic capacitors  Package — 5x5mm, 3 2-pin MLPQ  Lead-free and halogen fr ee  RoHS and WEEE compliant Applicat ions The SC417/SC427 is a stand-alone synchronous EcoSpeedTM buck regulator which incorporates Semtech’s advanced, patented adaptive on-time control archi.
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