參數(shù)資料
型號(hào)： LTC3414
廠商： Linear Technology Corporation
英文描述： 3.3-V CMOS 18-Bit Universal Bus Driver with 3-State Outputs 56-TSSOP -40 to 85
中文描述： 具有1.4A，500kHz降壓型開關(guān)穩(wěn)壓器
文件頁(yè)數(shù)： 1/20頁(yè)
文件大小： 320K
代理商： LTC3414
1
LT1936
1936fa
APPLICATIU
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
1.4A, 500kHz Step-Down
Switching Regulator
■
Wide Input Range: 3.6V to 36V
■
Short-Circuit Protected Over Full Input Range
■
1.9A Guaranteed Minimum Switch Current
■
5V at 1.4A from 10V to 36V Input
■
3.3V at 1.4A from 7V to 36V Input
■
5V at 1.2A from 6.3V to 36V Input
■
3.3V at 1.2A from 4.5V to 36V Input
■
Output Adjustable Down to 1.20V
■
500kHz Fixed Frequency Operation
■
Soft-Start
■
Uses Small Ceramic Capacitors
■
Internal or External Compensation
■
Low Shutdown Current: <2
μ
A
■
Thermally Enhanced 8-Lead MSOP Package
■
Automotive Battery Regulation
■
Industrial Control Supplies
■
Unregulated Wall Adapters
3.3V Step-Down Converter
Efficiency
The LT
1936 is a current mode PWM step-down DC/DC
converter with an internal 1.9A power switch, packaged in
a tiny, thermally enhanced 8-lead MSOP. The wide input
range of 3.6V to 36V makes the LT1936 suitable for
regulating power from a wide variety of sources, including
automotive batteries, 24V industrial supplies and unregu-
lated wall adapters. Its high operating frequency allows
the use of small, low cost inductors and ceramic capaci-
tors, resulting in low, predictable output ripple.
Cycle-by-cycle current limit, frequency foldback and ther-
mal shutdown provide protection against shorted outputs,
and soft-start eliminates input current surge during start-
up. Transient response can be optimized by using external
compensation components, or board space can be mini-
mized by using internal compensation. The low current
(<2
μ
A) shutdown mode enables easy power management
in battery-powered systems.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
V
IN
4.5V TO 36V
ON OFF
0.22
μ
F
10
μ
H
17.4k
22
μ
F
1936 TA01a
4.7
μ
F
V
3.3V
1.2A
V
IN
BOOST
V
C
GND
COMP
FB
LT1936
SHDN
SW
10k
LOAD CURRENT (A)
0
65
E
70
75
80
85
95
0.5
1
1936 TA01b
1.5
90
V
OUT
= 5V
V
IN
= 12V
V
OUT
= 3.3V
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