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LTC3703EG-5 Datasheet

  • LTC3703EG-5

  • 60V Synchronous Switching Regulator Controller

  • 32頁

  • LINER

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LTC3703-5
60V Synchronous
Switching Regulator Controller
FEATURES
s
s
s
s
s
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
High Voltage Operation: Up to 60V
Large 1
鈩?/div>
Gate Drivers (with 5V Supply)
No Current Sense Resistor Required
Step-Up or Step-Down DC/DC Converter
Dual N-Channel MOSFET Synchronous Drive
Excellent Transient Response and DC Line Regulation
Programmable Constant Frequency: 100kHz to
600kHz
鹵1%
Reference Accuracy
Synchronizable up to 600kHz
Selectable Pulse Skip Mode Operation
Low Shutdown Current: 25碌A(chǔ) Typ
Programmable Current Limit
Undervoltage Lockout
Programmable Soft-Start
16-Pin Narrow SSOP and 28-Pin SSOP Packages
The LTC
廬
3703-5 is a synchronous step-down switching
regulator controller that can directly step-down voltages
from up to 60V, making it ideal for telecom and automotive
applications. The LTC3703-5 drives external logic level
N-channel MOSFETs using a constant frequency (up to
600kHz), voltage mode architecture.
A precise internal reference provides 1% DC accuracy. A
high bandwidth error amplifier and patented* line feed
forward compensation provide very fast line and load
transient response. Strong 1鈩?gate drivers allow the
LTC3703-5 to drive multiple MOSFETs for higher current
applications. The operating frequency is user program-
mable from 100kHz to 600kHz and can also be synchro-
nized to an external clock for noise-sensitive applications.
Current limit is programmable with an external resistor
and utilizes the voltage drop across the synchronous
MOSFET to eliminate the need for a current sense resistor.
For applications requiring up to 100V operation, refer to
the LTC3703 data sheet.
PARAMETER
Maximum V
IN
MOSFET Gate Drive
V
CC
UV
+
V
CC
UV
鈥?/div>
LTC3703-5
60V
4.5V to 15V
3.7V
3.1V
LTC3703
100V
9.3V to 15V
8.7V
6.2V
APPLICATIO S
s
s
s
48V Telecom and Base Station Power Supplies
Networking Equipment, Servers
Automotive and Industrial Control
, LTC and LT are registered trademarks of Linear Technology Corporation.
*U.S. Patent Numbers: 5408150, 5055767, 6677210, 5847554, 5481178, 6304066, 6580258;
Others Pending.
TYPICAL APPLICATIO
High Efficiency High Voltage Step-Down Converter
V
CC
5V
+
22碌F
MODE/SYNC V
IN
30k
FSET
10k
1000pF
21.5k
1%
470pF
12k
I
MAX
INV
0.1碌F
100鈩?/div>
2200pF
113k
1%
RUN/SS
GND
VCC
DRV
CC
10鈩?/div>
COMP
TG
LTC3703-5
FB
SW
0.1碌F
BOOST
MMDL770T1
V
IN
6V TO 60V
+
Si7850DP
22碌F
脳2
EFFICIENCY (%)
8碌H
270碌F
16V
Si7850DP
+
V
OUT
5V
5A
BG
10碌F
BGRTN
1碌F
D1
MBR1100
37035 TA04
U
Efficiency vs Load Current
100
V
IN
= 12V
95
V
IN
= 42V
90
V
IN
= 24V
85
80
0
1
3
2
LOAD CURRENT (A)
4
5
37053 TA04b
U
U
37035f
1

LTC3703EG-5 產(chǎn)品屬性

  • LTC3703-5

  • 47

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 切換控制器

  • -

  • 電壓模式

  • 1

  • 330kHz

  • 96%

  • 4.1 V ~ 15 V

  • 是

  • 是

  • 無

  • 無

  • 無

  • 無

  • 無

  • 無

  • -40°C ~ 85°C

  • 28-SSOP（0.209"，5.30mm 寬）

  • 管件

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