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LTC3832EGN Datasheet

  • LTC3832EGN

  • High Power Step-Down Synchronous DC/DC Controllers for Low V...

  • 24頁

  • LINER

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LTC3832/LTC3832-1
High Power Step-Down
Synchronous DC/DC Controllers
for Low Voltage Operation
FEATURES
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
s
s
s
s
s
V
OUT
as Low as 0.6V
High Power Switching Regulator Controller
for 3.3V-5V to 0.6V-3.xV Step-Down Applications
No Current Sense Resistor Required
Low Input Supply Voltage Range: 3V to 8V
Maximum Duty Cycle > 91% Over Temperature
All N-Channel External MOSFETs
Excellent Output Regulation:
鹵1%
Over Line, Load
and Temperature Variations
High Efficiency: Over 95% Possible
Adjustable or Fixed 2.5V Output (LTC3832)
Programmable Fixed Frequency Operation: 100kHz to
500kHz
External Clock Synchronization
Soft-Start
Low Shutdown Current: <10碌A(chǔ)
Overtemperature Protection
Available in SO-8 and SSOP-16 Packages
The LTC
廬
3832/LTC3832-1 are high power, high effi-
ciency switching regulator controllers optimized for
3.3V-5V to 0.6V-3.xV step-down applications. A preci-
sion internal reference and feedback system provide
鹵1%
output regulation over temperature, load current
and line voltage variations. The LTC3832/LTC3832-1 use
a synchronous switching architecture with N-channel
MOSFETs. Additionally, the chip senses output current
through the drain-source resistance of the upper
N-channel MOSFET, providing an adjustable current limit
without a current sense resistor.
The LTC3832/LTC3832-1 operate with an input supply
voltage as low as 3V and with a maximum duty cycle of
>91% over temperature. They include a fixed frequency
PWM oscillator for low output ripple operation. The 300kHz
free-running clock frequency can be externally adjusted or
synchronized with an external signal from 100kHz to 500kHz.
In shutdown mode, the LTC3832 supply current drops to
<10碌A(chǔ). The LTC3832-1 is the SO-8 version without current
limit, frequency adjustment and shutdown functions.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
CPU Power Supplies
Multiple Logic Supply Generator
Distributed Power Applications
High Efficiency Power Conversion
TYPICAL APPLICATIO
4.7碌F
5.1鈩?/div>
0.1碌F
0.01碌F
15k
GND
6.49k
FB
4.32k
680pF
G2
PV
CC1
LTC3832-1
SS V
CC
/PV
CC2
COMP
G1
V
IN
3V TO 7V
100
+
MBR0520T1
90
80
70
60
50
V
IN
= 3.3V
40
0
1
2
Si9426DY
0.1碌F
L1
3.2碌H
V
OUT
1V
9A
Si9426DY
+
C
OUT
270碌F
2V
3832 F01
L1: SUMIDA CDEP105-3R2MC-88
C
OUT
: PANASONIC EEFUEOD271R
EFFICIENCY (%)
Figure 1. High Efficiency 3.3V to 1V Power Converter
U
Efficiency
V
OUT
= 2.5V
V
OUT
= 1V
3 4 5 6 7
LOAD CURRENT (A)
8
9
10
3832 F01b
U
U
sn3832 3832fs
1

LTC3832EGN 產(chǎn)品屬性

  • LTC3832/-1

  • 100

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 切換控制器

  • -

  • 電壓模式

  • 1

  • 360kHz

  • 95%

  • 3 V ~ 8 V

  • 是

  • 無

  • 無

  • 無

  • 無

  • 無

  • 無

  • 無

  • -40°C ~ 85°C

  • 16-SSOP（0.154"，3.90mm 寬）

  • 管件

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