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PDF SC410A Data sheet ( Hoja de datos )
| Número de pieza | SC410A | |
| Descripción | Step-Down Regulator | |
| Fabricantes | Semtech | |
| Logotipo |  |
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SC410Awww.DataSheet.co.kr
2A EcoSpeed® Step-Down Regulator
with LDO and Power Save
POWER MANAGEMENT
Features
Description
Input voltage — 7V to 24V
Output voltage — 0.75V to 7.5V
Output current — Up to 2A
Internal reference — + 1%
Small ceramic capacitors
Power good pin (open-drain)
Adaptive on-time control:
• Excellent transient response
• Programmable pseudo-fixed frequency during
CCM
Fault protection features (automatic fault recovery):
• Cycle-by-cycle current limit
• Short circuit protection
• Over and under output voltage protection
• Over-temperature
Internal soft-start
Power save and smart PSAVE
Internal LDO for bias voltage
Ultra-small lead-free 3 x 3(mm), 10-Pin MLPD package
WEEE and RoHS compliant and halogen-free
Applications
Networking Equipment, Embedded Systems
Medical Equipment, Office Automation
Instrumentation, Portable Systems
Consumer Devices such as DTV and Set-top Boxes
POL Converters
The SC410A is an integrated, synchronous 2A EcoSpeed®
step-down regulator. It incorporates Semtech’s advanced,
patented adaptive on-time architecture to achieve best-
in-class dynamic performance using point-of-load appli-
cations. The input voltage range is 7V to 24V with a
programmable output voltage from 0.75V up to 7.5V. The
device features an internal LDO and PSAVE mode for high
efficiency across the output load range.
Adaptive on-time control provides programmable
pseudo-fixed frequency operation in continuous conduc-
tion and excellent transient performance. The switching
frequency can be set from 200kHz to 1MHz, allowing the
designer to reduce external LC filtering and minimize light
load (standby) losses.
Additional features include cycle-by-cycle current limit,
soft start, output OV protection and over temperature
protection. The open-drain PGOOD pin provides output
status.
The device is available in a low profile, thermally enhanced
MLPD 3 x 3(mm) 10-pin package.
Typical Application Circuit
Enable
VIN
CIN
RTON
CLDO2
CLDO1
Rev. 1.0
SC410A
EN PGOOD
VIN
TON
BST
LX
CBST
L1
LDO
AGND
FB
PGND
COUT
RTOP
RBOT
PGOOD
VOUT
© 2011 Semtech Corporation
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
SC410A
Electrical Characteristics (continued)
Parameter
Conditions
Min Typ Max Units
Internal Power MOSFETs
Current Limit
Inductor Valley Current Limit, VLDO=5V 1.5 2
A
LX Leakage Current
VIN=24V, LX=0V, High Side
1 10 µA
Switch Resistance
High Side
Low Side
215
mΩ
110
Non-overlap time (1)
15 ns
Linear Regulator (The LDO is shorted to the bias node, internally)
LDO Accuracy
-4 4 %VLDO
LDO Current Limit
Short circuit protection, VIN = 12V, VLDO <80% of
final VLDO value
Operating current limit, VIN = 12V, VLDO > 80% of
final VLDO value
35
100
mA
LDO Drop Out Voltage
Note:
(1) Typical value from EVB, not ATE tested.
From VIN to VLDO, ILDO = 100mA
0.75 V
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
Block Diagram
VIN
AGND 9
LDO
Reference
PGOOD
5
FB
EN
7
PWM Control and Status
LDO
BST
1
FB 6
TON 8
Soft Start
LX
FB Comparator
On-Time
Generator
VIN
5V LDO
LDO
Gate Drive
Control
LDO
Zero Cross Detector
RILIM
Valley Current Limit
ILIM
10
LDO
SC410A
2 VIN
3 LX
4 PGND
11
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet SC410A.PDF ] | |
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