28
LTC4221
4221fa
© LINEAR TECHNOLOGY CORPORATION 2004
LT 0707 REV A • PRINTED IN THE USA
PART NUMBER DESCRIPTION COMMENTS
LTC1421 2-Channel, Hot Swap Controller 24-Pin, Operates from 3V to 12V and Supports –12V
LTC1422 Single Channel, Hot Swap Controller in SO-8 Operates from 2.7V to 12V, System Reset Output
LTC1642 Fault Protected, Hot Swap Controller Operates up to 16.5V, Overvoltage Protection to 33V
LTC1643AL/LTC1643AH PCI Hot Swap Controllers 3.3V, 5V and ±12V Supplies
LTC1645 Dual Channel Hot Swap Controller Operates from 1.2V to 12V, Power Sequencing
LTC1647 Dual Channel, Hot Swap Controller Operates from 2.7V to 16.5V
LTC4210 Single Channel, Hot Swap Controller in SOT-23 Operates from 2.7V to 16.5V, Multifunction Current Control
LTC4211 Single Channel, Hot Swap Controller in MSOP 2.5V to 16.5V, Multifunction Current Control
LTC4230 Triple Channel, Hot Swap Controller 1.7V to 16.5V, Multifunction Current Control
LTC4251 –48V Hot Swap Controller in S0T-23 –48V Hot Swap Controller, Active Current Limiting
LTC4252 –48V Hot Swap Controller in MSOP Active Current Limiting With Drain Acceleration
LTC4253 –48V Hot Swap Controller and Sequencer Active Current Limiting With Drain Acceleration and Three
Sequenced Power Good Outputs
RELATED PARTS
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear-tech.com
TYPICAL APPLICATIO
U
Sequenced Up/Down, Channel 2 Up First, Down Last
ON2
FAULT
GND
LTC4221
Z1
Z2
D1
FB2
PWRGD2
PWRGD1
V
OUT1
3.3V
5A
V
OUT2
2.5V
5A
FB1
LONG
LONG
SHORT
GND
FAULT
LONG
SHORT
D1: 1N4148
Z1, Z2: SMAJ10
TIMER
FILTER
ON1
V
CC1
SENSE1 GATE1 V
CC2
SENSE2 GATE2
V
CC1
3.3V
V
CC2
2.5V
ON
0V TO 3.3V
OR
3.3V TO 0V
BACKPLANE
CONNECTOR
(FEMALE)
PCB EDGE
CONNECTOR
(MALE)
R
X1
10Ω
R
X2
10Ω
R6
10k
R3
12.1k
R2
20.5k
R4
23.2k
R1
23.7k
R5
9.53k
R
F3
14.3k
Q2
IRF7413
R
F4
5.11k
R
F1
20k
R
F2
5.11k
4221 TA06
C
X1
100nF
C
FILTER
1nF
C
TIMER
470nF
C
X2
100nF
Q1
IRF7413
R
SENSE1
0.004Ω
R
SENSE2
0.004Ω
