lt3845ife-trpbf Linear Technology Corporation, lt3845ife-trpbf Datasheet - Page 24

• Manufacturer Part Number: lt3845ife-trpbf
• Description: High Voltage Synchronous Current Mode Step-down Controller With Adjustable Operating Frequency
• Manufacturer: Linear Technology Corporation

RELATED PARTS
LT3845
TYPICAL APPLICATION
24
PART NUMBER
LT1339
LTC
LTC1702A
LTC1735
LTC1778
LT3010
LT3430/LT3431
LTC3703/LTC3703-5
LT3724
LT3800
LT3844
No R
60V TRANSIENTS
®
1624
SENSE
9V TO 16V
C
C
L1: VISHAY IHLP-5050FD-01
M1, M2: VISHAY Si7850DP
is a trademark of Linear Technology Corporation.
IN
OUT
R2
16.8k
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
: TDK C4532X7R2A225K
V
: MURATA GRM32ER60J107ME20
IN
100pF
R1
10k
Capable of Withstanding 60V Transients, All Ceramic Capacitors, Soft-Start and Burst Mode Enabled
C1
DESCRIPTION
High Power Synchronous DC/DC Controller
Switching Controller
Dual 2-Phase Synchronous DC/DC Controller
Synchronous Step-Down DC/DC Controller
No R
50mA, 3V to 80V Linear Regulator
Monolithic 3A, 200kHz/500kHz Step-Down Regulator
100V Synchronous Switching Regulator Controllers
High Voltage Current Mode Switching Regulator
Controllers
High Voltage Synchronous Regulator Controller
High Voltage Current Mode Controller with
Programmable Operating Frequency
9V-16V to 3.3V at 5A DC/DC Converter, Frequency Synchronization Range 150kHz to 300kHz,
C
2.2μF
100V
×4
IN
●
SENSE
FAX: [phone]
R4
10k
SYNC
C2
5600pF
TM
8200pF
C
0.1μF
100V
Synchronous DC/DC Controller
IN2
C3
130k
R5
100k
R6
R3
1.1M
●
www.linear.com
1
2
3
4
5
6
7
8
V
SHDN
C
BURST_EN
V
V
SYNC
f
SET
IN
SS
FB
C
LT3845
SGND
17
SENSE
SENSE
BOOST
PGND
V
SW
TG
BG
CC
+
–
16
15
14
13
12
11
10
9
COMMENTS
V
Buck, Boost, SEPIC, 3.5V ≤ V
550kHz Operation, No R
3.5V = <V
4V = <V
1.275V = <V
8-Lead MSOP Package
5.5V = <V
No R
V
Onboard Bias Regulator, Burst Mode Operation, 200kHz Operation
V
Burst Mode Operation, 16-Lead TSSOP FE Package
V
Sync Capability, 16-Lead TSSOP FE Package
IN
IN
IN
IN
up to 60V, Drivers 10000pF Gate Capacitance, I
up to 60V, I
up to 60V, I
up to 60V, I
SENSE
D2 BAS521
IN
IN
IN
C4
2.2μF
16V
= <36V, Fast Transient Response, Current Mode, I
, Voltage Mode Control, GN16 Package
= <36V, 0.8V = <V
= <60V, 0.1Ω Saturation Switch, 16-Lead SSOP Package
OUT
OUT
OUT
OUT
= <60V, No Protection Diode Required,
16V
1μF
C5
≤ 5A, 16-Lead TSSOP FE Package,
≤ 20A, Current Mode, Onboard Bias Regulator,
≤ 5A, Onboard Bias Regulator, Burst Mode Operation,
SENSE
M2
Si7850DP
IN
, 3V = <V
OUT
M1
Si7850DP
≤ 36V; 8-Lead SO Package
= <6V, Current Mode, I
© LINEAR TECHNOLOGY CORPORATION 2006
IN
D1
B160
= <7V, I
10μH
L1
LT 0707 REV C • PRINTED IN USA
OUT
R
0.01Ω
OUT
SENSE
= <20A
= <20A
OUT
OUT
= <20A
= <20A
C
100μF
6.3V
×4
OUT
V
3.3V
5A
3845 TA04
OUT
3845fc