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參數資料
| 型號： | LTC1703CG |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | Synchronous 8-Bit Up/Down Binary Counters 24-PDIP 0 to 70 |
| 中文描述： | 5 A DUAL SWITCHING CONTROLLER, 750 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | 0.209 INCH, PLASTIC, SSOP-28 |
| 文件頁數： | 1/36頁 |
| 文件大小： | 343K |
| 代理商： | LTC1703CG |
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1
LTC1703
+
PV
CC
BOOST1
BG1
TG1
SW1
I
MAX1
FCB
RUN/SS1
COMP1
SGND
FB1
SENSE
VID0
VID1
I
MAX2
BOOST2
BG2
TG2
SW2
PGND
FAULT
RUN/SS2
COMP2
FB2
V
CC
VID4
VID3
VID2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
LTC1703
DCP1
MBR0520LT1
DCP2
MBR0520LT1
QT2
QB2
QT1
C
SS1
0.22
μ
F
R21
100k
R12
10.2k
0.1%
R32
1k
C11
220pF
CCP2
1
μ
F
C21
15pF
IMAX2
R
1
μ
F
C
SS2
0.22
μ
F
C32
2200pF
C22
15pF
C12
220pF
1
μ
F
C31
220pF
R31, 10k
R
IMAX1
,18.7k
RB2
11.5k
0.1%
R22, 100k
V
OUT1
TO 2V
15A
GND
L1
1
μ
H
CCP1
1
μ
F
QB1B
QB1A
C
OUT1
180
μ
F
4V
×
6
C
IN
150
μ
F
10V
×
2
V
4.5V TO 5.5V
V
OUT2
1.5V
3A
1703 TA01
VID0
VID1
VID3
VID4
L1: MURATA LQT12535C1R5N12
L2: COILTRONICS UP2B-2R2
QT1, QB1A, QB1B: INTERNATIONAL RECTIFIER IRF7811
QT2, QB2: 1/2 FAIRCHILD NDS8926
L2
2.2
μ
H
+
C
OUT2
180
μ
F
4V
+
10
GND
GND
Dual 550kHz Synchronous
2-Phase Switching Regulator
Controller with 5-Bit VID
The LTC
1703 is a dual switching regulator controller opti-
mized for high efficiency with low input voltages. It includes
two complete, on-chip, independent switching regulator
controllers. Each is designed to drive a pair of external
N-channel MOSFET devices in a voltage mode feedback,
synchronous buck configuration. The LTC1703 includes
digital output voltage adjustment on side 1 that conforms to
the Intel Mobile VID specification. It uses a constant-
frequency, true PWM design switching at 550kHz, minimiz-
ing external component size and cost and optimizing load
transient performance. The synchronous buck architecture
automatically shifts to discontinuous and then to Burst
Mode
TM
operation as the output load decreases, ensuring
maximum efficiency over a wide range of load currents.
The LTC1703 features an onboard reference trimmed to 1%
and delivers better than 1.5% regulation at the converter
outputs. An optional latching FAULT mode protects the load
if the output rises 15% above the intended voltage. Each
channel can be enabled independently; with both channels
disabled, the LTC1703 shuts down and supply current drops
below 100
μ
A.
I
Two Independent PWM Controllers in One Package
I
Side 1 Output Is Compliant with Intel
Mobile
VID Specifications (Includes 5-Bit DAC)
I
0.9V to 2.0V Output Voltage with 25mV/50mV Steps
I
Two Sides Run Out-of-Phase to Minimize C
IN
I
All N-Channel External MOSFET Architecture
I
No External Current Sense Resistor
I
Precision Internal 0.8V
±
1% Reference
I
550kHz Switching Frequency Minimizes External
Component Size
I
Very Fast Transient Response
I
Up to 25A Output Current per Channel
I
Low Shutdown Current: < 100
μ
A
I
Small 28-Pin SSOP Package
APPLICATIU
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation. Pentium is a registered trademark
of Intel Corporation.
I
Mobile Pentium
III Processor Systems
I
Microprocessor Core and I/O Supplies
I
Multiple Logic Supply Generator
I
High Efficiency Power Conversion
Dual Output Mobile Pentium III Processor Supply
FEATURES
DESCRIPTIOU
TYPICAL APPLICATIO
U
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PDF描述 |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC1703CG#PBF | 功能描述:IC REG SW DUAL SYNC VID 28SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 標準包裝:2,000 系列:- 應用:控制器，DSP 輸入電壓:4.5 V ~ 25 V 輸出數:2 輸出電壓:最低可調至 1.2V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:30-TFSOP（0.173"，4.40mm 寬） 供應商設備封裝:30-TSSOP 包裝:帶卷 (TR) |
| LTC1703CG#TR | 制造商:Linear Technology 功能描述:LDO Cntrlr REG CTRLR 0.9V to 2V 28-Pin SSOP T/R |
| LTC1703CG#TRPBF | 功能描述:IC REG SW DUAL SYNC VID 28SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數:1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件 |
| LTC1703IG | 功能描述:IC REG SW DL SYNC W/VID 28-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數:1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件 |
| LTC1703IG#PBF | 功能描述:IC REG SW DUAL SYNC VID 28SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數:1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件 |
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