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參數資料
| 型號： | LTC3416 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 4A, 4MHz, Monolithic Synchronous Step-Down Regulator with Tracking |
| 中文描述： | 第4A，4MHz的，單片同步降壓型穩壓器與跟蹤 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 238K |
| 代理商： | LTC3416 |
LTC3416
1
3416f
I
High Efficiency: Up to 95%
I
4A Output Current
I
Low R
DS(ON)
Internal Switch: 67m
I
Tracking Input to Provide Easy Supply Sequencing
I
Programmable Frequency: 300kHz to 4MHz
I
2.25V to 5.5V Input Voltage Range
I
±
2% Output Voltage Accuracy
I
0.8V Reference Allows Low Output Voltage
I
Low Dropout Operation: 100% Duty Cycle
I
Power Good Output Voltage Monitor
I
Overtemperature Protected
I
Available in a 20-Lead Thermally Enhanced
TSSOP Package
4A, 4MHz, Monolithic
Synchronous Step-Down
Regulator with Tracking
I
Portable Instruments
I
Notebook Computers
I
Distributed Power Systems
I
Battery-Powered Equipment
I
POL Board Power
SVIN
R
T
PGOOD
22
μ
F
V
2.5V
100
μ
F
×
2
V
1.8V
4A
0.2
μ
H
SW
LTC3416
RUN/SS
I
TH
TRACK
PGND
SGND
V
FB
PVIN
127k
7.5k
200k
255k
200k
255k
3416 F01a
820pF
V
IN
2.5V TO 5.5V
I/O VOLTAGE
Figure 1a. 2.5V/4A Step-Down Regulator with Tracking
The LTC
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
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
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.
Figure 1b. Efficiency vs Load Current
LOAD CURRENT (A)
0.01
40
E
50
60
70
80
0.10
1
10
3416 G09
30
20
10
0
90
100
V
IN
= 2.5V
V
= 1.8V
f = 2MHz
V
IN
= 3.3V
FEATURES
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIO
U
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