參數(shù)資料
型號(hào): LT3500IMSE#TRPBF
廠商: Linear Technology
文件頁(yè)數(shù): 1/28頁(yè)
文件大小: 322K
描述: IC REG DL BUCK/LINEAR 16-MSOP
標(biāo)準(zhǔn)包裝: 2,500
拓?fù)洌?/td> 降壓(降壓)(1),線性(LDO)(1)
功能: 任何功能
輸出數(shù): 2
頻率 - 開(kāi)關(guān): 500kHz ~ 2.4MHz
電壓/電流 - 輸出 1: 0.8 V ~ 38.9 V,2A
電壓/電流 - 輸出 2: 可調(diào)式,13mA
帶 LED 驅(qū)動(dòng)器: 無(wú)
帶監(jiān)控器: 無(wú)
帶序列發(fā)生器: 無(wú)
電源電壓: 3 V ~ 36 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 16-TFSOP(0.118",3.00mm 寬)裸露焊盤
供應(yīng)商設(shè)備封裝: 16-MSOP,裸露焊盤
包裝: 帶卷 (TR)
LT3500
1
3500fc
FEATURES
APPLICATIONS
DESCRIPTION
Monolithic 2A Step-Down
Regulator Plus Linear
Regulator/Controller
The LT
?/DIV>
3500 is a current mode PWM step-down DC/DC
converter with an internal 2.3A switch. The wide input range
of 3V to 40V makes the LT3500 suitable for regulating
power from a wide variety of sources, including automo-
tive batteries, 24V industrial supplies and unregulated
wall adapters.
Resistor-programmable 250kHz to 2.2MHz frequency
range and synchronization capability enable optimization
between ef ciency and external component size. Cycle-
by-cycle current limit, frequency foldback and thermal
shutdown provide protection against a shorted output.
The soft-start feature controls the ramp rate of the output
voltage, eliminating input current surge during start-up,
and also provides output tracking.
The LT3500 contains an internal NPN transistor with feed-
back control which can be con gured as a linear regulator
or as a linear regulator controller.
The LT3500s low current shutdown mode (<12糀) enables
easy power management in battery-powered systems.
n
 Wide Input Range: 3V to 36V Operating,
40V Maximum
n
 Short-Circuit Protected Over Full Input Range
n
 2A Output Current Capability
n
 Adjustable/Synchronizable Fixed Frequency 
Operation from 250kHz to 2.2MHz
n
 Soft-Start/Tracking Capability
n
 Output Adjustable Down to 0.8V
n
 Adjustable Linear Regulator/Driver with 13mA 
Output Capability
n
 Power Good Comparator with Complimentary 
Outputs
n
 Low Shutdown Current: 12糀
n
 Thermally Enhanced 3mm ?3mm DFN or 16-Pin
MSOP Package
n
 Automotive Battery Regulation
n
 Industrial Control
n
 Wall Transformer Regulation
n
 Distributed Power Regulation
Dual Step-Down Converters
Output Voltage Ripple
Switching Converter Ef ciency
6.8糎
0.47糉
22糉
22糉
42.2k
8.06k
2.2糉
0.47糉
V
IN
6V TO 36V
40.2k
53.6k
330pF
3500 TA01a
V
OUT1
5V
1A
V
OUT2
3.3V
1A
B240A
BST
V
IN
SW
FB
SHDN
SS
LT3500
R
T/
SYNC
V
C
LDRV
LFB
PG
PG
8.06k
24.9k
1k
LOAD CURRENT (A)
0
90
85
80
75
70
65
60
55
50
1.6
3500 TA01b
0.4   0.8   1.2
2.0
1.4
0.2   0.6   1.0
1.8
V
IN
 = 12V
I
OUT2
 = 0A
FREQUENCY = 800kHz
500ns/DIV
3500 TA01c
V
OUT1
 = 5V AT 1A
AC COUPLED
2mV/DIV
V
OUT2
 = 3.3V AT 1A
AC COUPLED
2mV/DIV
TYPICAL APPLICATION
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
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