ltc1876eg-trpbf Linear Technology Corporation, ltc1876eg-trpbf Datasheet - Page 36

• Manufacturer Part Number: ltc1876eg-trpbf
• Description: High Efficiency, 2-phase, Dual Synchronous Step-down Switching Controller And Step-up Regulator
• Manufacturer: Linear Technology Corporation

RELATED PARTS
LTC1876
TYPICAL
PART NUMBER
LTC1625/LTC1775
LTC1628/LTC1628-PG High Efficiency, Dual, 2 Phase Synchronous Step-Down Controllers
LTC1708-PG
LTC1709
LTC1735
LTC1736
LTC1772
LTC1778
LTC3713
LTC3714
LTC3716
LTC3728
Adaptive Power and No R
36
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone]
200mA
V
OUT3
12V
APPLICATION
SENSE
0.01 F
220pF
220pF
0.1 F
10.2k
6.8k
6.8k
20k
1%
20k
1%
10 F
DESCRIPTION
No R
Dual, 2 Phase Synchronous Controller with Mobile VID Control
2 Phase, 5-Bit Adustable, High Efficiency, Synchronous Step-Down Controller Constant Frequency, VID, up to 42A
High Efficiency Synchronous Step-Down Switching Regulator
High Efficiency Synchronous Controller with Mobile VID Control
SOT-23 Step-Down Controller
No R
Low Input Voltage Synchronous Step-Down Controller
No R
2-Phase DC/DC Controller for Mobile Pentium Processors
Dual, 2-Phase 550kHz Synchronous Step-Down Controller
are trademarks of Linear Technology Corporation.
86.6k
20V
+
SENSE
SENSE
SENSE
63.4k
0.01 F
470pF
105k
1%
470pF
1%
D5
TM
DC/DC Controller for Mobile Pentium Processors
Wide Input Range Synchronous Step-Down Controller
1000pF
1000pF
Current Mode Synchronous Step-Down Controllers
INTV
3.3V
CC
U
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
High Efficiency Triple 5V/ 3.3V/12V Power Supply
RUN/SS1
SENSE1
SENSE1
V
FREQSET
STBYMD
FCB
I
SGND
3.3V
I
V
SENSE2
SENSE2
AUXSGND
AUXV
AUXSW
AUXSW
TH1
TH2
OSENSE1
OSENSE2
www.linear.com
OUT
FB
LTC1876
L3, 10 H
+
–
–
+
AUXPGND
AUXPGND
RUN/SS2
BOOST1
BOOST2
PGOOD
EXTV
AUXV
INTV
AUXSD
PGND
SW1
SW2
BG1
BG2
TG1
TG2
V
CC
CC
IN
IN
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
SHUTDOWN
0.1 F
1 F
100k
D3
D4
0.1 F
+
0.1 F
4.7 F
10V
V
(<7V)
PULL-UP
5.2V TO 28V
0.1 F
10
V
IN
M1
M3
33 F
4.6 H
35V
4.6 H
10 F
L1
35V
L2
COMMENTS
Burst Mode Operation, GN-16
Constant Frequency, Standby, 5V and 3.3V LDO
36V Input; V
V
Output Fault Protection, GN-16
Output Fault Protection, G-24
2.5V V
Operation for Smallest PCB Area
Up to 97% Efficiency; 4V V
0.8V V
1.5V V
MOSFETs
Supports up to 25A; Sense Resistor Optional
Small, Low Profile Design; Supports up to 30A
Phase-Lockable from 250kHz to 550kHz,
5mm 5mm QFN and SSOP-28, 3.5V V
M2
M4
OUT2
3
3
1
1
0.008
for Memory, Chipset I/O
0.008
R
R
SENSE
SENSE
IN
OUT
IN
, No R
47 F
56 F
6.3V
D2
D1
SP
4V
SP
OUT1
2
2
9.8V; I
4
4
LINEAR TECHNOLOGY CORPORATION 2000
(0.9)(V
1876 TA03
SENSE
LT/TP 1002 1K REV A • PRINTED IN USA
for CPU Core Voltage;
V
3.3V
5A
OUT
M1, M2, M3, M4: FDS6912A
L1, L2: SUMIDA CEP123-4R6
L3: TOKO A920CY-100M
D1, D2: MBRM140T3
D3, D4: BAT54A
D5: CMDSH-3
OUT1
V
5V
5A
IN
, Standard 5V-Logic Level
OUT2
); Input up to 20A
Up to 4.5A; 550kHz
IN
36V
IN
1876fa
36V