SC2463 반도체 회로 부품 판매점
High Performance Quad Output Switching Regulator
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 Semtech |
POWER MANAGEMENT
Description
The SC2463 is a high performance controller for multi-
output converters that can be configured for a wide vari-
ety of applications. The SC2463 utilizes PWM synchro-
nous buck topologies where efficiency is most important.
It also provides two dedicated programmable positive
linear regulators using external transistors. Each of the
four outputs is adjustable down to 0.5V. The two PWM
switchers are synchronized 180° out of phase reducing
input ripple, allowing for fewer input capacitors. Power
up sequencing prevents converter latch-up.
The SC2463 can be synchronized to other converters to
prevent beat frequencies. The wide range programmable
operating frequency allows users to optimize a converter
design. The PWM switchers sense the voltage across the
low-side MOSFETs on-resistance to efficiently provide
adjustable current-limit, eliminating costly current-sense
resistors. A POK signal is issued when soft-start is com-
plete on both PWM switchers and their outputs are within
10% of the set point.
Typical Application Circuit
SC2463
High Performance Quad Output
Switcwhwiwn.DgataRSheeegt4uU.cloamtor
Features
Two synchronized converters for low noise
Power up sequencing to prevent latch-up
Out of phase operation for low input ripple
Over current protection
Wide input range, 4.5 to 30V
Programmable frequency up to 700kHz
Low shutdown current 100uA
Two synchronous bucks for high efficiency at high
current
Two programmable positive linear regulators
Output voltage as low as 0.5V
Small package TSSOP-28. This product is fully
WEEE and RoHS compliant
Applications
DSL applications with multiple input voltage
requirements
Mixed-Signal applications requiring 4 positive
output voltages
Cable modem power management
Base station power management
+4.5-30V
Q1 R1
C2
C1
C3
R3
+3.3V
+2.5V
+1.2V
C4
C10
Q4
C6
R4
R7
6 SS/SHDN
9 OSC
7 SY NC
8 POK
4 BD4
C14
5 FB4
R9
R10
11 BD3
C17
Q7
R11
10 FB3
C18
C16 R14
U1 D1 D2
SC2463
BST2
GD2H
PH2
GD2L
FB2
EO2
BST1
GD1H
PH1
GD1L
FB1
EO1
17
18
19
20
13
12
26
25
24
23
2
3
C7
R8 C11
C12
C13
C19
Q2
Q3
Q5
Q6
C20
R15
R16 R17
L1
L2
R18
+3.3V
C8 R5 (as low as 0.5V)
R6
+1.5V
C15 (as low as 0.5V)
R12
R13
Revision: May 16, 2007
1
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SC2463
POWER MANAGEMENT
www.DataSheet4U.com
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. Exposure to Absolute Maximum rated conditions for extended periods of time may affect device
reliability.
Parameter
Symbol
Maximum
Units
VIN, BDI
Power Dissipation at TA = 25°C (1)
Operating Ambient Temperature Range
Operating Junction Temperature Range
Storage Temperature Range
Thermal Resistance, Junction to Case (1)
Thermal Resistance, Junction to Ambient (1)
Lead Temperature (Soldering) 10 Sec.
Peak Reflow Soldering Temperature
BST1, BST2 to PGND
VIN, VBDI
Pd
TA
TJ
TSTG
θJC
θJA
TSOLDER
TREFLOW
-0.3 to 30
1.3
-40 < TA < 105
-40 < TJ < 150
-60 < TSTG < 150
13
96
260
235
-0.3 to 35
V
W
°C
°C
°C
°C/W
°C/W
°C
°C
V
PVCC, AVCC, GD1L, GD2L, BD3, BD4 to PGND
-0.3 to 7
V
EO1, EO2, FB1, FB2, FB3, FB4, ILIM1, ILIM2, OSC,
SYNC, POK, SS/SHDN to AGND
-0.3 to 7
V
GD1H to PH1, GD2H to PH2
-0.3 to 7
V
PGND to AGND
+/-0.3
V
PH1 to BST1, PH2 to BST2
-6 to 0.3
V
GD1H, GD1L, GD2H, GD2L peak source/sink current
1
Note: (1) 1 x 1 inch 1 oz copper ground plane.
Electrical Characteristics
Unless specified:
V = 12V, PVCC = AVCC = 5V, fs = 600KHz, SS/SHDN = 5V, SYNC = 0V,
IN
TA
=
T
J
=
-40°C
to
105°C
Parameter
Test Conditions
Min Typ
Max
A
Unit
Power Supply using BDI Regulator
Shutdown Current ISUPPLY
Operating Current
SS/SHDN = 0V
No load
100 200
µA
10 14 mA
AVCC
VIN > 5.5V
4.6 5 5.4 V
PVCC
VIN > 5.5V
4.6 5 5.4 V
Undervoltage Lockout
Start Threshold
3.90 4.20 4.45
V
UVLO Hysteresis
200 mV
2007 Semtech Corp.
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( semtech )
SC2463 regulator
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국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
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