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LM2640 数据表(PDF) 8 Page - Texas Instruments

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部件名 LM2640
功能描述  LM2640 Dual Adjustable Step-Down Switching Power Supply Controller
Download  29 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM2640 数据表(HTML) 8 Page - Texas Instruments

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LM2640
SNVS019B – DECEMBER 1998 – REVISED APRIL 2013
www.ti.com
Electrical Characteristics (continued)
Typicals and limits appearing in regular type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire
junction temperature range for operation, 0 to +125°C. Unless otherwise specified under the Parameter or Conditions
columns, VIN = 10V, and VSD = VON/OFF1 = VON/OFF2 = 5V
(1)(2)(3)
Symbol
Parameter
Conditions
Typical
Limit
Units
VREF
Reference Voltage
0.01 mA
≤ IREF ≤ 5 mA Source, VLIN
2.5
V
≤ 6V
2.45
V(min)
2.55
V(max)
0.01 mA
≤ IREF ≤ 5 mA Source, VLIN
2.45
V(min)
≤ 6V
2.5
2.555
V(max)
−40°C ≤ TJ ≤ +125°C
VLIN
Output Voltage of the Linear
6V
≤ VIN ≤ 30V,
5
V
Voltage Regulator
0 mA
≤ ILIN ≤ 25 mA
4.6
V(min)
5.4
V(max)
VUVLO
Undervoltage Lockout Threshold
See(7)
4.0
V
3.6
V(min)
4.4
V(max)
−40°C ≤ TJ ≤ +125°C
(7)
3.6
V(min)
4.0
4.42
V(max)
LIN-to-VOUT Switch-Over
VOUT taken at CSL1
4.8
V
Threshold
Logic Inputs
VIH
Minimum High Level Input
2.4
V(min)
Voltage (SD, ON/OFF1,
−40°C ≤ TJ ≤ +125°C
2.45
V(min)
ON/OFF2, and SYNC)
VIH
Minimum High Level Input
2.6
V(min)
Voltage (2NDFB/FPWM)
VIL
Maximum Low Level Input
0.8
V(max)
Voltage (SD, ON/OFF1,
ON/OFF2, SYNC, and
2NDFB/FPWM)
Maximum Input Leakage Current
Logic Input Voltage 0 or 5V
±0.1
µA
(SD, ON/OFF1, ON/OFF2, and
SYNC)
(7)
The controllers remain OFF until the voltage of the 5V, 50 mA linear regulator (output at LIN) reaches this threshold.
8
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Copyright © 1998–2013, Texas Instruments Incorporated
Product Folder Links: LM2640


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