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LM53635LQRNLRQ1 データシート(PDF) 9 Page - Texas Instruments

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部品番号 LM53635LQRNLRQ1
部品情報  Step-Down DC-DC Converter
Download  55 Pages
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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

LM53635LQRNLRQ1 データシート(HTML) 9 Page - Texas Instruments

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LM53625-Q1, LM53635-Q1
www.ti.com
SNVSAA7A – DECEMBER 2015 – REVISED MAY 2016
Product Folder Links: LM53625-Q1 LM53635-Q1
Submit Documentation Feedback
Copyright © 2015–2016, Texas Instruments Incorporated
7.6 System Characteristics
The following specifications are ensured by design provided that the component values in the typical application circuit are
used. These parameters are not ensured by production testing. Limits apply over the recommended operating junction
temperature range of –40°C to +150°C, unless otherwise noted. 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 = 13.5 V.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIN-MIN
Minimum input voltage for full
functionality at 1.5 A load, after start-
up.
VOUT = 3.3 V +2/–3% regulation
3.5
V
Minimum input voltage for full
functionality at maximum rated load
3.5 A after start-up.
VOUT = 3.3 V +2/–3% regulation
3.9
VOUT
Output voltage for 5-V option
VIN = 5.6 V to 36 V, IOUT = 3.5 A
4.925
5
5.08
V
Output voltage for 3.3-V option
VIN 3.9 V to 36 V, IOUT = 3.5 A
3.24
3.3
3.35
Output voltage for 5-V option
VIN = 5.5 V to 36 V, IOUT = 100 µA to 100
mA
4.92
5.05
5.125
Output voltage for 3.3-V option
VIN = 3.8 V to 36 V, IOUT = 100 µA to 100
mA
3.24
3.33
3.38
Output voltage for adjustable option
VIN = VOUT + 1 V to 36 V, IOUT = 3.5 A
–2.25%
2.25%
IQ-VIN
Input current to VIN pin
VIN= 13.5 V, VOUT = 3.3 V, IOUT = 0 A
FPWM = 0
15
40
µA
VIN = 13.5 V, VOUT = 5.0 V and IOUT = 0 A
FPWM = 0
20
VDROP1
Minimum input to output voltage
differential to maintain regulation
accuracy without inductor DCR drop
VOUT = 3.3 V/5 V, IOUT= 3.5 A, +2/–3%
output accuracy
0.35
0.6
V
VDROP2
Minimum input to output voltage
differential to maintain FSW ≥ 1.85
MHz without inductor DCR drop
VOUT = 3.3 V/5 V, IOUT=3.5 A, FSW = 1.85
MHz, 2% regulation accuracy
1.1
1.4
V
Efficiency
Typical Efficiency without inductor
loss
VIN = 13.5 V, VOUT= 5.0 V, IOUT = 3.5 A
90%
VIN = 13.5 V, VOUT = 3.3 V, IOUT = 3.5 A
84%
VIN = 13.5 V, VOUT = 5 V, IOUT = 100 mA
88%
(1)
See Detailed Description.
(2)
This is the time from the rising edge of EN to the time that the soft-start ramp begins.
(3)
Tw is the wait time between current limit trip and re-start. Tw is nominally 4× the soft-start time. However, provision must be made to
make Tw longer to ensure survivability during an output short circuit.
7.7 Timing Characteristics
Limits apply over the recommended operating junction temperature range of –40°C to +150°C, unless otherwise noted.
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. Unless otherwise stated the following
conditions apply: VIN = 13.5 V.
MIN
NOM
MAX
UNIT
tON
Minimum switch on time, VIN = 18 V, IL=1 A
65
84
ns
tOFF
Minimum switch off time, VIN = 3.8 V, IL=1 A
60
80
ns
tRESET-act
Delay time to RESET high signal
2
3
4
ms
tRESET-filter
Glitch filter time for RESET function(1)
12
25
45
µs
tSS
Soft-Start Time from first switching pulse to VREF at 90%
2
3.2
5
ms
tEN
Turn-on delay, CVCC = 2.2 µF
(2)
1
ms
tW
Short circuit wait time (hiccup time)(3)
6
ms
tFPWM
Change transition time from AUTO to FPWM MODE, 20-mA load,
VIN = 13.5 V
100
µs
Change transition time from FPWM to AUTO MODE, 20-mA load,
VIN = 13.5 V
80
µs


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