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LT8610I

更新时间： 2024-01-21 01:20:51
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
20页 264K
描述
42V, 2.5A Synchronous Step-Down Regulator

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中文翻译

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LT8610I 数据手册

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Electrical Specifications Subject to Change  
LT8610  
42V, 2.5A Synchronous  
Step-Down Regulator  
with 2.5µA Quiescent  
Current  
FEATURES  
DESCRIPTION  
The LT®8610 is a compact, high efficiency, high speed  
synchronous monolithic step-down switching regulator  
that consumes only 2.5μA of quiescent current. Top and  
bottom power switches are included with all necessary  
circuitry to minimize the need for external components.  
Low ripple Burst Mode operation enables high efficiency  
down to very low output currents while keeping the output  
n
Wide Input Voltage Range: 3.4V to 42V  
Ultralow Quiescent Current Burst Mode® Operation:  
n
2.5μA I Regulating 12V to 3.3V  
Q
IN  
P-P  
OUT  
Output Ripple < 10mV  
n
High Efficiency Synchronous Operation:  
96% Efficiency at 1A, 5V  
94% Efficiency at 1A, 3.3V  
from 12V  
from 12V  
IN  
OUT  
IN  
OUT  
n
n
n
n
n
n
n
n
n
n
Fast Minimum Switch-On Time: 50ns  
ripplebelow10mV . ASYNCpinallowssynchronization  
P-P  
Low Dropout Under All Conditions: 200mV at 1A  
Allows Use Of Small Inductors  
Low EMI  
to an external clock. Internal compensation with peak cur-  
rent mode topology allows the use of small inductors and  
results in fast transient response and good loop stability.  
The EN/UV pin has an accurate 1V threshold and can be  
Adjustable and Synchronizable: 200kHz to 2.2MHz  
Current Mode Operation  
usedtoprogramV undervoltagelockoutortoshutdown  
IN  
Accurate 1V Enable Pin Threshold  
Internal Compensation  
Output Soft-Start and Tracking  
the LT8610 reducing the input supply current to 1μA. A  
capacitor on the TR/SS pin programs the output voltage  
ramp rate during start-up. The PG flag signals when V  
OUT  
Small Thermally Enhanced 16-Lead MSOP Package  
is within ±±9 of the programmed output voltage as well  
as fault conditions. The LT8610 is available in a small  
16-lead MSOP package with exposed pad for low thermal  
resistance.  
APPLICATIONS  
n
Automotive and Industrial Supplies  
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks  
of Linear Technology Corporation. All other trademarks are the property of their respective  
owners.  
n
General Purpose Step-Down  
n
GSM Power Supplies  
TYPICAL APPLICATION  
5V 2.5A Step-Down Converter  
12VIN to 5VOUT Efficiency  
100  
±5  
±0  
85  
80  
75  
70  
65  
V
IN  
V
BST  
IN  
5.5V TO 42V  
0.1μF  
4.7μH  
4.7μF  
EN/UV  
PG  
V
OUT  
5V  
SW  
LT8610  
2.5A  
47μF  
SYNC  
BIAS  
10nF  
1M  
TR/SS  
FB  
1μF  
10pF  
INTV  
CC  
RT PGND GND  
f
= 700kHz  
60  
55  
50  
SW  
V
V
= 12V  
= 24V  
IN  
IN  
60.4k  
= 700kHz  
243k  
0
0.5  
1
1.5  
2
2.5  
f
SW  
8610 TA01a  
LOAD CURRENT (A)  
8610 G01  
8610p  
1
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