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LM20134MHE Folha de dados(PDF) 4 Page - Texas Instruments

Nome de Peças LM20134MHE
Descrição Electrónicos  LM20134/LM20134Q 4A, PowerWise Synchronous Buck Regulator with Input
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Página de início  http://www.ti.com
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LM20134, LM20134Q
SNVS527G – OCTOBER 2007 – REVISED MARCH 2013
www.ti.com
ELECTRICAL CHARACTERISTICS
Unless otherwise stated, the following conditions apply: AVIN = PVIN = VIN = 5V. Limits in standard type are for TJ = 25°C
only, limits in bold face type apply over the junction temperature (TJ) range of -40°C to +125°C. Minimum and Maximum limits
are specified by 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.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VFB
Feedback pin voltage
VIN = 2.95V to 5.5V
0.788
0.8
0.812
V
ΔVOUT/ΔIOUT
Load Regulation
IOUT = 100 mA to 4A
0.08
%/A
ICL
Switch Current Limit Threshold
VIN = 3.3V
5.8
6.4
7.9
A
RDS_ON
High-Side Switch On Resistance
ISW = 3.5A
36
55
m
RDS_ON
Low-Side Switch On Resistance
ISW = 3.5A
32
52
m
IQ
Operating Quiescent Current
Non-switching, VFB = VCOMP
3.5
6
mA
ISD
Shutdown Quiescent current
VEN = 0V
90
180
µA
VUVLO
VIN Under Voltage Lockout
Rising VIN
2.45
2.7
2.95
V
VUVLO_HYS
VIN Under Voltage Lockout Hysteresis
Falling VIN
45
100
mV
VVCC
VCC Voltage
IVCC = 0 µA
2.45
2.7
2.95
V
ISS
Soft-Start Pin Source Current
VSS/TRK = 0V
2
4.5
7
µA
VTRACK
SS/TRK Accuracy, VSS - VFB
VSS/TRK = 0.4V
-10
3
15
mV
Oscillator and Clock Synchronization
FOSC
Oscillator Frequency
VSYNC = Static
360
410
460
kHz
FOSCH
Maximum SYNC Frequency
1500
kHz
FOSCL
Minimum SYNC Frequency
460
kHz
VIH_SYNC
SYNC pin Logic High
2
V
VIL_SYNC
SYNC pin Logic Low
0.8
V
ISYNC
SYNC pin input leakage
VSYNC = 5V
10
nA
DCMAX
Maximum Duty Cycle
ILOAD = 0A
85
%
TON_TIME
Minimum On Time
100
ns
TCL_BLANK
Current Sense Blanking Time
After Rising VSW
80
ns
Error Amplifier and Modulator
IFB
Feedback pin bias current
VFB = 0.8V
1
100
nA
ICOMP_SRC
COMP Output Source Current
VFB = VCOMP = 0.6V
80
100
µA
ICOMP_SNK
COMP Output Sink Current
VFB = 1.0V, VCOMP = 0.6V
80
100
µA
gm
Error Amplifier Transconductance
ICOMP = ± 50 µA
450
510
600
µmho
AVOL
Error Amplifier Voltage Gain
2000
V/V
Power Good
VOVP
Over Voltage Protection Rising Threshold
With respect to VFB
105
108
111
%
VOVP_HYS
Over Voltage Protection Hysteresis
2
3
%
VPGTH
PGOOD Rising Threshold
With respect to VFB
92
94
96
%
VPGHYS
PGOOD Falling Hysteresis
2
3
%
TPGOOD
PGOOD deglitch time
16
µs
IOL
PGOOD Low Sink Current
VPGOOD = 0.4V
0.6
1
mA
IOH
PGOOD High Leakage Current
VPGOOD = 5V
5
100
nA
Enable
VIH_EN
EN Pin Turn on Threshold
VEN Rising
1.08
1.18
1.28
V
VEN_HYS
EN Pin Hysteresis
66
mV
Thermal Shutdown
TSD
Thermal Shutdown
160
°C
TSD_HYS
Thermal Shutdown Hysteresis
10
°C
Thermal Resistance
θJA
Junction to Ambient
38
°C/W
4
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