LTC1705 데이터 시트보기 (PDF) - Linear Technology
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LTC1705
Linear Technology
LTC1705 Datasheet PDF : 28 Pages
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LTC1705
TYPICAL APPLICATIO
Complete 2-Step Notebook Power Supply
STDBY5V
VOUT1
5V
4A
10µF
6.3V
150µF +
6.3V
×2
105k
1%
20k
1%
L5, 0.33µH
D03316P-331HC
4mΩ
0.1µF
50V
Q1
L1
2.9µH
D5
MBRD
835L
100pF
47pF
5VENABLE
0.1µF
D1
CMDSH-3
Q2
0.22µF
Q3
10Ω
1000pF
10Ω
180pF
330pF
0.1µF
+
4.7µF
27
TG1
25
BOOST1
26
SW1
23
BG1
2 SENSE1+
3 SENSE1–
22
EXTVCC
4
VOSENSE1
1 RUN/SS1
8
ITH1
33k
9 SGND
5
FREQSET
7
28 FCB
FLTCPL
1µF 10Ω
0.1µF
D2
50V CMDSH-3
0.1µF
50V
VIN
+ CIN
7V TO 20V
22µF
50V
21 24
INTVCC VIN
16
TG2
Q5
18
BOOST2
17 0.1µF
SW2
LTC1628
19
BG2
SENSE2+ 14
SENSE2– 13
PGND 20
12
VOSENSE2
RUN/SS2 15
11
ITH2
Q4
10Ω
1000pF
10Ω
L2
4.6µH 10mΩ
D4
MBRS
130T3
100pF
47pF
33k 180pF
330pF
3.3VENABLE
0.1µF
10µF
6.3V
+
180µF
4V
63.4k
1%
20k
1%
10
3.3VOUT
6
STBYMD
STDBYMD
0.01µF
STDBY3.3V
0.1µF
VOUT2
3.3V
5A
150µF +
6.3V
×2
VOUTC
0.9V TO 2V
15A
1µF
D6
MBR0520LT1
QT1A
QT1B
L3
0.68µH
1µF
+
1µF
180µF
4V
×6
D5
MBRD
835L
QB1A
QB1B
27k
1.8k
1800pF
1800pF
11k
Q1, Q2, Q3: IRF7805
Q4, Q5: IRF7807
COREENABLE
L1: ETQP6F2R9L
L2: ETQP6F4R6H
QT1A, QT1B, QB1A, QB1B: FAIRCHILD FDS6670A
QT2, QB2: NDS8926
L3: SUMIDA CEP125-4712-T007
L4: SUMIDA CDRH6D28-3R0
330pF
0.1µF
5k
10Ω
10µF
2
5
PVCC
TGC
3
BOOSTC
6 SWC
22
19
PGOOD
VCC
26
TGIO
27
BOOSTIO
SWIO 25
1µF
4
BGC
28
BGIO
8
13 IMAXC
SENSEC
11
FBC
10
COMPC
9 RUN/SS
7
PGND
LTC1705
1
IMAXIO
COMPIO 21
16k
11k
FBIO 20
100pF
24
VINCLK
+
10µF
10V
12
GND
VID0
VID1
VID2
VOUTCLK
VID3 VID4
23
+
10µF
14 15 16 17 18
10V
VID0 VID1 VID2 VID3 VID4
D7
1µF
MBR
0520LT1
QT2
L4
3µH
100µF +
QB2
4V
×2
10k
2200pF 1%
8.87k
1%
VOUTCLK
2.5V
150mA
1µF
VOUTIO
1µF 1.5V
3A
1705 TA02
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTC1628/LTC1628-PG Dual High Efficiency 2-Phase Synchronous Step-Down Controller
LTC1703
Dual 550kHz Synchronous 2-Phase Switching Regulator
Controller with VID
Constant Frequency, Standby 5V and 3.3V LDOs,
3.5V ≤ VIN ≤ 36V
Mobile VID Control with 25MHz GBW Voltage Mode, VIN ≤ 7V
LTC1708
LTC1736
Dual, 2-Phase Synchronous Step-Down Controller with 5-Bit VID Mobile CPU VID, Dual Output 3.5V ≤ VIN ≤ 36V,
Minimum CIN and COUT
Synchronous Step-Down Controller with 5-Bit VID Control
Output Fault Protection, Power Good Output, 3.5V to 36V Input
28 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 q FAX: (408) 434-0507 q www.linear.com
1705fa LT/TP 0801 1.5K REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2001
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