LTC3824
16
3824fh
For more information www.linear.com/LTC3824
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
LINEAR TECHNOLOGY CORPORATION 2006
LT 0116 REV H • PRINTED IN USA
relaTeD parTs
Typical applicaTion
3V 2A Buck Converter
3824 TA02a
15k
80.6k
C
CAP
0.1µF
255k
100pF
51Ω
C
OUT
270µF
1µF
16V
L1
33µH
V
OUT
3.3V
2A
0.1µF
301k
C
IN1
33µF
100V
C
IN2
2.2µF
100V
1000pF
LTC3824
SENSESYNC/MODE
GATE
V
FB
V
C
V
CC
R
SET
GND
SS
V
IN
4.5V TO 60V
D1
Q1
+
+
R
S
0.025Ω
100pF
C
IN1
: SANYO 63MV68AX
C
IN2
: TDK C4532X7R2A225M
C
OUT
: SANYO OSCON, 16SP270M, TDKC2012X7RIC105K
L1: D104C919AS-330M
D1: SS3H9
Q1: Si7465DP
Q2: 2N7002
CAP
4.7MΩ*
Q2*
SHUTDOWN
* OPTIONAL, SEE PAGE 9 FOR MORE INFORMATION
PART NUMBER DESCRIPTION COMMENTS
LTC3864 60V Low I
Q
Step-Down DC/DC Controller with
100% Duty Cycle Capability
3.5V ≤ V
IN
≤ 60V, 0.8V ≤ V
OUT
≤ V
IN
, I
Q
= 40µA, Selectable Fixed
Frequency 50kHz to 850kHz, 3mm × 4mm DFN-12, MSOP-12E
LTC3891 60V, Low I
Q
, Synchronous Step-Down DC/DC Controller 4V ≤ V
IN
≤ 60V, 0.8V ≤ V
OUT
≤ 24V, I
Q
= 50µA,
Phase-Lockable Fixed Frequency 50kHz to 900kHz, 3x4 QFN-20
LTC3892/LTC3892-1 60V, Low I
Q
, Dual 2-Phase Synchronous Step-Down
DC/DC Controller with Adj Gate Drive Voltage
4.5V ≤ V
IN
≤ 60V, 0.8V ≤ V
OUT
≤ 0.99V
IN
, I
Q
= 29µA,
PLL Fixed Frequency 50kHz to 900kHz,
LTC3890
/LTC3890-1/
LTC3890-2/LTC3890-3
60V, Low I
Q
, Dual 2-Phase Synchronous
Step-Down DC/DC Controller with Fixed Gate Drive Voltage
4V ≤ V
IN
≤ 60V, 0.8V ≤ V
OUT
≤ 24V, I
Q
= 50µA,
PLL Fixed Frequency 50kHz to 900kHz
LT3845A 60V, Low I
Q
, Single Output Synchronous
Step-Down DC/DC Controller
4V≤ V
IN
≤ 60V, 1.23V ≤ V
OUT
≤ 36V, I
Q
= 120µA,
Synchronizable Fixed Frequency 100kHz to 600kHz, TSSOP-16
LT3840 60V Wide Input Range Synchronous Regulator Controller
Integrated Buck-Boost Supply for 7.5V MOSFET Gate Drive
2.5V≤ V
IN
≤ 60V, 1.23V ≤ V
OUT
≤ 60V, I
Q
= 120µA, Synchronizable
Fixed Frequency 50kHz to 1MHz, TSSOP-28, 4x6 QFN-38
LTC7860 High Efficiency Switching Surge Stopper High Efficiency V
OUT
Clamp Stops High Voltage Input Surges,
MSOP-12E
LTC3886 60V Dual Output Step-Down Controller
with Digital Power System Management
4.5V ≤ V
IN
≤ 60V, 0.5V ≤ V
OUT0,1
(±0.5%) ≤ 13.8V, 70mS Start-Up,
I
2
C/PMBus Interface, Input Current Sense
LTC3810 100V Synchronous Step-Down DC/DC Controller Constant On-time Valley Current Mode 4V ≤ V
IN
≤ 60V,
0.8V ≤ V
OUT
≤ 0.93V
IN
, SSOP-28
LTC3638 High Efficiency, 140V 250mA Step-Down Regulator with
Adjustable 20mA to 250mA Maximum OutputCurrent
4V≤ V
IN
≤ 140V, 0.8V ≤ V
OUT
≤ V
IN
, I
Q
= 12µA,
No Compensation Required, MSOP-16E (12)
LTC7138 High Efficiency
, 140V 400mA Step-Down Regulator with
Adjustable 100mA to 400mA Maximum OutputCurrent
4V≤ V
IN
≤ 140V, 0.8V ≤ V
OUT
≤ V
IN
, I
Q
= 12µA, MSOP-16(12)
No Compensation Required, MSOP-16E (12)
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LTC3824
