參數(shù)資料
型號： LTC3713
廠商： Linear Technology Corporation
英文描述： Low Input Voltage, High Power, No RSENSE Synchronous Buck DC/DC Controller
中文描述： 低輸入電壓，高功率，無檢測電阻同步降壓DC / DC控制器
文件頁數(shù)： 1/24頁
文件大小： 325K
代理商： LTC3713
1
LTC3713
3713fa
FEATURES
APPLICATIU
DESCRIPTIOU
TYPICAL APPLICATIOU
Low Input Voltage,
High Power, No R
SENSE
TM
Synchronous Buck DC/DC Controller
I
Very Low V
IN(MIN)
: 1.5V
I
True Current Mode Control
I
5V Drive for N-Channel MOSFETs Eliminates
Auxillary 5V Supply
I
No Sense Resistor
Required
I
Uses Standard 5V Logic-Level N-Channel MOSFETs
I
Adjustable Current Limit
I
Adjustable Frequency
I
Switch t
ON(MIN)
< 100ns
I
2% to 90% Duty Cycle at 200kHz
I
0.8V
±
1% Reference
I
Power Good Output Voltage Monitor
I
Programmable Soft-Start
I
Output Overvoltage Protection
I
Optional Short-Circuit Shutdown Timer
I
Small 24-Lead SSOP Package
I
Telecom Card 3.3V, 2.5V, 1.8V Step-Down
I
Bus Termination (DDR memory, SSTL)
I
Synchronous Buck with General Purpose Boost
I
Low V
IN
Synchronous Boost
The LTC
3713 is a high current, high efficiency synchro-
nous buck switching regulator controller optimized for
use with very low input supply voltages. It operates from
inputs as low as 1.5V and provides a regulated output
voltage from 0.8V up to (0.9)V
IN
. The controller uses
a valley current control architecture to enable high operat-
ing frequencies without requiring a sense resistor.
Operating frequency is selected by an external resistor and
is compensated for variations in V
IN
and V
OUT
. The LTC3713
uses a pair of standard 5V logic-level N-channel external
MOSFETs, eliminating the need for expensive P-channel
or low threshold devices.
Discontinuous mode operation provides high efficiency
operation at light loads. A forced continuous control
pin reduces noise and RF interference, and can assist
secondary winding regulation by disabling discontinuous
operation when the main output is lightly loaded. Fault
protection is provided by internal foldback current limit-
ing, an output overvoltage comparator and an optional
short-circuit shutdown timer.
Figure 1. High Efficiency Step-Down Converter from 1.8V to 3.3V Input
Efficiency vs Load Current
, LTC and LT are registered trademarks of Linear Technology Corporation.
No R
SENSE
is a trademark of Linear Technology Corporation.
RUN/SS
BOOST
TG
SW1
SENSE
+
SENSE
–
INTV
CC
V
IN1
0.33
μ
F
LTC3713
5.6k
10k
20k
680pF
0.1
μ
F
M1
CMDSH-3
PGND
BG
V
IN2
I
TH
PGOOD
I
ON
V
FB1
SHDN
SGND
V
FB2
SW2
10
μ
F
M2
B340A
C
: PANASONIC EEFUEOD271R
L1: (A) PANASONIC ETQP6FIR8BFA
(B) TOKO D104C-1.8
μ
H
M1, M2: (A) IRF7822, (B) IRF7811A
L1
1.8
μ
H
C
OUT
270
μ
F
×
2
3713 F01a
22
μ
F
×
2
V
1.8V TO 3.3V
V
1.25V
10A
4.7
μ
F
4.7
μ
H
MBR0520
12.1k
37.4k
330k
+
LOAD CURRENT (A)
0.01
0
E
10
30
40
50
100
70
0.10
1
3
3713 F01b
20
80
A
B
90
60
0.04
0.40
7
12
15
V
IN
= 2.5V
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相關代理商/技術參數(shù)
參數(shù)描述
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LTC3713EG#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR)
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