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LTC3416EFE Datasheet

  • LTC3416EFE

  • 4A, 4MHz, Monolithic Synchronous Step-Down Regulator with Tr...

  • 231.66KB

  • 16頁(yè)

  • LINER

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LTC3416
4A, 4MHz, Monolithic
Synchronous Step-Down
Regulator with Tracking
FEATURES
s
s
s
s
s
s
s
s
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DESCRIPTIO
High Efficiency: Up to 95%
4A Output Current
Low R
DS(ON)
Internal Switch: 67m鈩?/div>
Tracking Input to Provide Easy Supply Sequencing
Programmable Frequency: 300kHz to 4MHz
2.25V to 5.5V Input Voltage Range
鹵2%
Output Voltage Accuracy
0.8V Reference Allows Low Output Voltage
Low Dropout Operation: 100% Duty Cycle
Power Good Output Voltage Monitor
Overtemperature Protected
Available in a 20-Lead Thermally Enhanced
TSSOP Package
The LTC
廬
3416 is a high efficiency monolithic synchro-
nous, step-down DC/DC converter utilizing a constant
frequency, current mode architecture. It operates from an
input voltage range of 2.25V to 5.5V and provides a
regulated output voltage from 0.8V to 5V while delivering
up to 4A of output current. The internal synchronous
power switch with 67m鈩?of on-resistance increases effi-
ciency and eliminates the need for an external Schottky
diode. Switching frequency is set by an external resistor.
100% duty cycle provides low dropout operation extend-
ing battery life in portable systems. OPTI-LOOP
廬
compen-
sation allows the transient response to be optimized over
a wide range of loads and output capacitors.
The LTC3416 operates in forced continuous operation and
provides tracking of another power supply rail. Forced
continuous operation reduces noise and RF interference and
provides excellent transient response. Fault protection is
provided by an overcurrent comparator, and adjustable
compensation allows the transient response to be optimized
over a wide range of loads and output capacitors.
, LTC and LT are registered trademarks of Linear Technology Corporation.
OPTI-LOOP is a registered trademark of Linear Technology Corporation.
APPLICATIO S
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Portable Instruments
Notebook Computers
Distributed Power Systems
Battery-Powered Equipment
POL Board Power
TYPICAL APPLICATIO
I/O VOLTAGE
V
IN
2.5V TO 5.5V
V
OUT2
2.5V
100
90
22碌F
80
EFFICIENCY (%)
127k
7.5k
820pF
255k
SVIN PVIN
R
T
PGOOD
SW
LTC3416
RUN/SS PGND
I
TH
SGND
TRACK V
FB
70
60
50
40
30
20
10
0.2碌H
100碌F
脳2
V
OUT1
1.8V
4A
255k
3416 F01a
0
0.01
200k
200k
Figure 1a. 2.5V/4A Step-Down Regulator with Tracking
Figure 1b. Efficiency vs Load Current
3416f
U
V
IN
= 2.5V
V
IN
= 3.3V
V
OUT
= 1.8V
f = 2MHz
0.10
1
LOAD CURRENT (A)
10
3416 G09
U
U
1

LTC3416EFE 產(chǎn)品屬性

  • LTC3416

  • 74

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器

  • -

  • 降壓（降壓）

  • 可調(diào)式

  • 1

  • 0.8 V ~ 5 V

  • 2.25 V ~ 5.5 V

  • 電流模式

  • 1MHz

  • 4A

  • 是

  • -40°C ~ 85°C

  • 表面貼裝

  • 20-TSSOP（0.173"，4.40mm 寬）裸露焊盤(pán)

  • 管件

  • 20-TSSOP-EP

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