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LM46001PWPT データシート(PDF) 6 Page - Texas Instruments

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部品番号 LM46001PWPT
部品情報  LM46001 SIMPLE SWITCHER짰 3.5 V to 60 V 1 A Synchronous Step-Down Voltage Converter
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

LM46001PWPT データシート(HTML) 6 Page - Texas Instruments

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LM46001
SNVSA46A – JUNE 2014 – REVISED JULY 2014
www.ti.com
Electrical Characteristics (continued)
Limits apply over the recommended operating junction temperature (TJ) range of -40°C to +125°C, unless otherwise stated.
Minimum and Maximum limits are specified 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. Unless otherwise stated, the following
conditions apply: VIN = 24 V, VOUT = 3.3 V, FS = 500 kHz.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
VOLTAGE REFERENCE (FB PIN)
TJ = 25 ºC
1.009
1.016
1.023
VFB
Feedback voltage
TJ = -40 ºC to 85 ºC
0.999
1.016
1.031
V
TJ = -40 ºC to 125 ºC
0.999
1.016
1.039
ILKG-FB
Input leakage current at FB pin
FB = 1.016 V
0.2
65
nA
THERMAL SHUTDOWN
Shutdown threshold
160
ºC
TSD
(1)
Thermal shutdown
Recovery threshold
150
ºC
CURRENT LIMIT AND HICCUP
IHS-LIMIT
Peak inductor current limit
2.07
2.45
2.71
A
ILS-LIMIT
Valley inductor current limit
0.94
1.1
1.25
A
SOFT START (SS/TRK PIN)
ISSC
Soft-start charge current
1.17
2.2
2.85
µA
RSSD
Soft-start discharge resistance
UVLO, TSD, OCP, or EN = 0 V
16
k
Ω
POWER GOOD (PGOOD PIN)
Power-good flag over voltage tripping
VPGOOD-HIGH
% of FB voltage
110%
113%
threshold
Power-good flag under voltage tripping
VPGOOD-LOW
% of FB voltage
83%
90%
threshold
VPGOOD-HYS
Power-good flag recovery hysteresis
% of FB voltage
6%
VEN = 3.3 V
40
125
PGOOD pin pull down resistance when
RPGOOD
Ω
power bad
VEN = 0 V
60
150
MOSFETS (2)
IOUT = 1 A
RDS-ON-HS
High-side MOSFET ON-resistance
419
m
Ω
VBIAS = VOUT = 3.3 V
IOUT = 1 A
RDS-ON-LS
Low-side MOSFET ON-resistance
231
m
Ω
VBIAS = VOUT = 3.3 V
(1)
Guaranteed by design. Not production tested
(2)
Measured at package pins
6.6 Timing Requirements
Typical values represent the most likely parametric norm at TJ = 25°C.
MIN
TYP
MAX
UNIT
CURRENT LIMIT AND HICCUP
NOC
Hiccup wait cycles when LS current limit tripped
32
Cycles
TOC
Hiccup retry delay time
5.5
ms
SOFT START (SS/TRK PIN)
TSS
Internal soft-start time when SS pin open circuit
4.1
ms
POWER GOOD (PGOOD PIN)
TPGOOD-RISE Power-good flag rising transition deglitch delay
220
µs
TPGOOD-FALL Power-good flag falling transition deglitch delay
220
µs
6
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