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Giải thích chi tiết về linh kiện  LM26400Y Dual 2-A, 500-kHz Wide Input Range Buck Regulator
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LM26400Y bảng dữ liệu(HTML) 5 Page - Texas Instruments

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LM26400Y
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SNVS457D – FEBRUARY 2007 – REVISED OCTOBER 2015
6.5 Electrical Characteristics
Unless otherwise stated, the following conditions apply: AVIN = PVIN = VIN = 5 V. Limits are for TJ = 25°C. Minimum and
maximum limits are ensured through test, design, or statistical correlation. Typical values represent the most likely parametric
norm at TJ = 25°C, and are provided for reference purposes only.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
TJ = 25°C
0.6
Feedback Loop Closed
TJ = 0°C to 85°C
0.591
0.611
VFB
Voltages at FB1 and FB2 Pins
V
TJ = 25°C
0.6
Feedback Loop V Closed
TJ = –40°C to 125°C
0.585
0.617
Line Regulation of FB1 and FB2 Voltages,
ΔVFB_Line
Expressed as PPM Change Per Volt of VIN
VIN = 3 V to 20 V
66
ppm/V
Variation
Current in FB1 and FB2 Pins
TJ = 25°C
0.4
IFB
VFB = 0.6 V
nA
TJ = –40°C to 125°C
250
TJ = 25°C
2.7
VIN Rising From 0 V
TJ = –40°C to 125°C
2.9
VUVLO
Undervoltage Lockout Threshold
V
TJ = 25°C
2.3
VIN Falling From 3.3 V
TJ = –40°C to 125°C
2
UVLO Hysteresis
TJ = 25°C
0.36
VUVLO_HYS
V
TJ = –40°C to 125°C
0.2
0.55
TJ = 25°C
0.52
FSW
Switching Frequency
MHz
TJ = –40°C to 125°C
0.39
0.65
TJ = 25°C
96%
DMAX
Maximum Duty Cycle
TJ = –40°C to 125°C
90%
DMIN
Minimum Duty Cycle
2%
TJ = 25°C
175
HTSSOP, 2-A Drain Current
TJ = –40°C to 125°C
320
RDS(ON)
ON-Resistance of Internal Power MOSFET
m
TJ = 25°C
194
WSON, 2-A Drain Current
TJ = –40°C to 125°C
350
Peak Current Limit of Internal MOSFET
TJ = 25°C
3
ICL
A
TJ = –40°C to 125°C
2.5
4.5
ISD
Shutdown Current of AVIN Pin
EN1 = EN2 = 0 V
2
nA
Quiescent Current of AVIN Pin (both
EN1 = EN2 = 5 V, FB1 = FB2 = 0.7 V,
IQ
4
mA
channels are enabled but not switching)
TJ = –40°C to 125°C
VEN_IH
Input Logic High of EN1 and EN2 Pins
TJ = –40°C to 125°C
2.5
V
VEN_IL
Input Logic Low of EN1 and EN2 Pins
TJ = –40°C to 125°C
0.4
V
IEN
EN1 and EN2 Currents (sink or source)
5
nA
Switch Leakage Current Measured at SW1
ISW_LEAK
EN1 = EN2 = SWx = 0
1
µA
and SW2 Pins
Phase Shift Between SW1 and SW2 Rising
ΔΦ
Feedback Loop Closed. Continuous Conduction Mode.
170
180
19
deg
Edges
SSx Pin Current
TJ = 25°C
16
ISS
µA
TJ = –40°C to 125°C
11
21
ΔISS
Difference Between SS1 and SS2 Currents
TJ = –40°C to 125°C
3
µA
FB1 and FB2 Frequency Foldback
VFB_F
0.35
V
Threshold
TSD
Thermal Shutdown Threshold
Junction temperature rises.
165
°C
TSD_HYS
Thermal Shutdown Hysteresis
Junction temperature falls from above TSD.
15
°C
Copyright © 2007–2015, Texas Instruments Incorporated
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