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参数资料
| 型号： | SC1144ABCSW.TR |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 8500 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封装： | SO-24 |
| 文件页数： | 1/11页 |
| 文件大小： | 279K |
| 代理商： | SC1144ABCSW.TR |
POWER MANAGEMENT
1
www.semtech.com
SC1144
Programmable, High Performance
Multi-Phase PWM Controller
PRELIMINARY
Features
Applications
Revision 1, January 2001
Description
The SC1144 is a high performance, multi-phase PWM
controller designed for high power microprocessors re-
quiring ultra fast transient response, such as the
Pentiumll and beyond. Utilizing a novel and unique de-
sign, the controller distributes the output load equally
across (up to) four converter channels by digitally phase
shifting the PWM outputs. This approach greatly reduces
the stress and heat on the output stage components
while lowering input and output ripple current by as much
as 80%. Accurate current sharing among the four phases
is achieved by precision design techniques and trimming
of critical elements.
The high speed transconductance error amplifier is ex-
ternally initialized using a soft-start capacitor allowing the
controller to wake-up without overshoot, thus protect-
ing the low voltage microprocessor loads. The output drive
voltage to the power MOSFETs is programmable to mini-
mize switching losses in the drive circuitry in asynchro-
nous applications.
The floating feedback ground allows remote sense ca-
pability. The output voltage is digitally programmable by
means of a 5 bit DAC. A single resistor programs the
master clock frequency (8MHz max) or the controller may
be synchronized using an external oscillator. The number
of operating phases is programmable independent of
clock. The parts features under-voltage lock-out with hys-
teresis and over-current protection.
u Allows use of small surface mount components
u Ultra fast transient recovery time
u Wide frequency operating range,200Khz-2Mhz per
phase
u Selectable 2, 3, 4 phase operation
u Floating feedback ground for remote sensing
u Precision load current sharing
u Selectable internal or external clock
u Soft start, Over current protection
u 5-bit DAC programmable output,VRM8.4 compatible
u 1% output voltage accuracy
u programmable Overcurrent, Soft start and drive
voltage
u High end servers and workstations
u High current/Ultra-fast transient microprocessors
u Voltage Regulator Modules
Typical Application Circuit
Vid3
Vid4
Vid1
Vid2
VOUT
+12V
VOUT,1.6V,50A
Vid0
+5V power
15K
2.2k
10K
10
.022
300k
10K
4K
.01u
0
100UF
.6uh
0
1.5
0
1.5
.1u
0
22
10K
10uf,6.3v
22u,10V
.01
22u,10V
10
SC1405
13
4
3
2
1
14
6
5
10
7
9
11
12
8
TG
CO
GND
EN
OVP_S
BST
DELAY_C
S_MOD
PGND
PRDY
BG
DSPS_DR
DRN
Vcc
22u,10V
IRF7811
22u,10V
SC1405
13
4
3
2
1
14
6
5
10
7
9
11
12
8
TG
CO
GND
EN
OVP_S
BST
DELAY_C
S_MOD
PGND
PRDY
BG
DSPS_DR
DRN
Vcc
SC1144
12
9
2
3
1
13
7
5
6
11
14
4
10
15
16
17
18
19
20
21
22
23
24
8
OC-
Vid3
Divsel
Clksel
5v
Comp
Vid1
Rref
Vid0
OC+
FB
Extclk
Vid4
Bgout
FBG
Enable
GND
Drv2
Drv0
12V
Drv1
Drv3
Outv
Vid2
22u,10V
10u,16V
.001
FDB7030
SC1405
13
4
3
2
1
14
6
5
10
7
9
11
12
8
TG
CO
GND
EN
OVP_S
BST
DELAY_C
S_MOD
PGND
PRDY
BG
DSPS_DR
DRN
Vcc
1u,16V
10u,16V
.1u
IRF7811
FDB7030
.1u
1u,16V
SS12
.6uh
22u,10V
.6uh
1000uf
SS12
1000uf
1.5
FDB7030
0
1u,16V
10u,16V
IRF7811
SC1405
13
4
3
2
1
14
6
5
10
7
9
11
12
8
TG
CO
GND
EN
OVP_S
BST
DELAY_C
S_MOD
PGND
PRDY
BG
DSPS_DR
DRN
Vcc
Long PCB Trace
Frequency:1Mhz/Phase
相关PDF资料 |
PDF描述 |
|---|---|
| SC141D-U | 400 V, 6 A, TRIAC, TO-220AB |
| SC141N-A | 800 V, 6 A, TRIAC, TO-220AB |
| SC141N-C | 800 V, 6 A, TRIAC, TO-220AB |
| SC141N-D1 | 800 V, 6 A, TRIAC, TO-220AB |
| SC141N-L | 800 V, 6 A, TRIAC, TO-220AB |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SC1144ABCSWTRT | 制造商:Semtech Corporation 功能描述:Voltage Mode PWM Controller 24-Pin SOIC T/R |
| SC1146 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:VRM9.0 PROGRAMMABLE, MULTI-PHASE, HIGH PERFORMANCE PWM CONTROLLER |
| SC1146CSW | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:VRM9.0 PROGRAMMABLE, MULTI-PHASE, HIGH PERFORMANCE PWM CONTROLLER |
| SC1146CSW.TR | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:VRM9.0 PROGRAMMABLE, MULTI-PHASE, HIGH PERFORMANCE PWM CONTROLLER |
| SC11485 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:HiCOLOR-16 Color Palette |
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