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LM3631 Fiches technique(PDF) 9 Page - Texas Instruments

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No de pièce LM3631
Description  Complete LCD Backlight and Bias Power
Download  57 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

LM3631 Fiches technique(HTML) 9 Page - Texas Instruments

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LM3631
www.ti.com
SNVS834 – AUGUST 2014
Electrical Characteristics (continued)
Unless otherwise specified, limits apply over the full operating ambient temperature range (
−40°C ≤ TA ≤ 85°C), VIN = 3.6 V,
VPOS = VOREF = 5.4 V, VNEG = –5.4 V, VBST = 5.7 V, VCONT = 3.3V.
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
PGFALLING
Power good decreasing
% of target VLDO_OREF
90%
IOREF_MAX
Maximum output current
50
mA
ICL_OREF
Output current limit
80
mA
VBIASBST = 5.8 V, VOREF = 5.5 V,
IRUSH_PK_OREF
Peak start-up inrush current (8)
250
mA
COREF = 10 µF
ILOAD_LDO_OREF =
VDO_OREF
LDO_OREF dropout voltage (9)
ILOAD_LDO_OREF_MAX, VLDO_OREF =
80
mV
4.0 V
F = 10 Hz to 500 kHz @ Imax/2,
Power supply rejection ratio,
PSRROREF
VBST_OUT to VLDO_OREF, 300 mV
25
dB
LDO_OREF (8)
minimum headroom
Start-up time, LDO_OREF,
COREF = 10 µF, VLDO_OREF = 5.5 V
tST_OREF
1
ms
VLDO_OREF = 10% to 90% (8)
Output pull-down resistor,
LDO_OREF pull-down enabled,
RPD_OREF
130
200
270
Ω
LDO_OREF
LDO_OREF disabled
LCD CONTROLLER SUPPLY OUTPUT (LDO_CONT)
LDO_CONT_VOUT = 00
1.8
LDO_CONT_VOUT = 01
2.3
Output voltage
V
LDO_CONT_VOUT = 10
2.8
LDO_CONT_VOUT = 11
3.3
Output accuracy
Output Voltage = 1.8 V, 1-mA load
–2%
2%
VCONT
LDO_CONT line transient response
VIN + 500 mVp-p AC Square
–50
50
mV
(8)
Wave, 100 mV/µs 200 Hz at 5 mA
LDO_CONT load transient response
5-mA to 80-mA load transient @ 2
–50
50
mV
(8)
µs TRISE/FALL
DC load regulation (8)
1 mA
≤ ILOAD_LDO_CONT ≤ 80 mA
20
mV
ICONT_MAX
Maximum output current
80
mA
ICL_CONT
Output current limit
130
mA
VDO_CONT
LDO_CONT dropout voltage (10)
ILOAD = 80 mA, VCONT = 3.3 V
80
mV
F = 10 Hz to 500 kHz @ Imax/2 VIN
Power supply rejection ratio,
PSRRLDO_CONT
to VLDO_CONT, 300-mV minimum
25
dB
LDO_CONT (11)
headroom
Start-up time, LDO_CONT, VCONT =
VCONT = 1.8 V
tST_CONT
1
ms
10% to 90% (11)
Output pull-down resistor,
LDO_CONT pull-down enabled,
RPD_CONT
200
Ω
LDO_CONT
LDO_CONT disabled
LOGIC INPUTS (PWM, NRST, LCD_EN, SCL, SDA, OTP_SEL)
VIL
Input logic low
0
0.4
V
VIH
Input logic high
1.2
VIN
V
IINPUT
Logic input current
–1
1
µA
LOGIC OUTPUTS (SDA, FLAG)
VOL
Output logic low
IOL = 3 mA
0
0.4
V
ILEAKAGE
Output leakage current
1
µA
PWM INPUT
ƒPWM_INPUT
PWM input frequency
100
20000
Hz
tMIN
Minimum PWM ON/OFF time
400
ns
tTIMEOUT
PWM timeout(11)
24
ms
(9)
VBST – VOREF when VOREF has dropped 100 mV below target.
(10) VIN – VCONT when VCONT has dropped 100 mV below target.
(11) Limits set by characterization and/or simulation only.
Copyright © 2014, Texas Instruments Incorporated
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