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LM2696 Datasheet(PDF) 3 Page - Texas Instruments

Part # LM2696
Description  LM2696 3A, Constant On Time Buck Regulator
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LM2696 Datasheet(HTML) 3 Page - Texas Instruments

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LM2696
www.ti.com
SNVS375B – OCTOBER 2005 – REVISED APRIL 2013
ABSOLUTE MAXIMUM RATINGS
(1) (2) (3)
Voltages from the indicated pins to GND
AVIN
−0.3V to +26V
PVIN
−0.3V to (AVIN+0.3V)
CBOOT
−0.3V to +33V
CBOOT to SW
−0.3V to +7V
FB, SD, SS, PGOOD
−0.3V to +7V
Storage Temperature Range
−65°C to +150°C
Junction Temperature
+150°C
Lead Temperature (Soldering, 10 sec.)
260°C
Minimum ESD Rating
1.5 kV
(1)
Absolute Maximum Ratings indicate limits beyond which damage may occur to the device. Operating Ratings indicate conditions for
which the device is intended to be functional, but do not ensure specific performance limits. For ensured specifications, see Electrical
Characteristics.
(2)
If Military/Aerospace specified devices are required, please contact the TI Sales Office/ Distributors for availability and specifications.
(3)
Without PCB copper enhancements. The maximum power dissipation must be derated at elevated temperatures and is limited by TJMAX
(maximum junction temperature),
θJ-A (junction to ambient thermal resistance) and TA (ambient temperature). The maximum power
dissipation at any temperature is: PDissMAX = (TJMAX - TA) /θJ-A up to the value listed in the Absolute Maximum Ratings. θJ-A for HTSSOP-
16 package is 38.1°C/W, TJMAX = 125°C.
OPERATING RANGE
Junction Temperature
−40°C to +125°C
AVIN to GND
4.5V to 24V
PVIN
4.5V to 24V
ELECTRICAL CHARACTERISTICS
Specifications with standard typeface are for TJ = 25°C, and those in boldface type apply over the full Operating
Temperature Range (TJ = −40°C to +125°C). 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 specified VIN = 12V.
Symbol
Parameter
Condition
Min
Typ
Max
Units
VFB
Feedback Pin Voltage
VIN = 4.5V to 24V
1.225
1.254
1.282
V
ISW = 0A to 3A
ICL
Switch Current Limit
VCBOOT = VSW + 5V
3.6
4.9
6.4
A
RDS_ON
Switch On Resistance
ISW = 3A
0.13
0.22
IQ
Operating Quiescent Current
VFB = 1.5V
1.3
2
mA
VUVLO
AVIN Under Voltage Lockout
Rising VIN
3.9
4.125
4.3
V
VUVLO HYS
AVIN Under Voltage Lockout Hysteresis
60
120
mV
ISD
Shutdown Quiescent Current
VSD = 0V
12
25
µA
kON
Switch On-Time Constant
ION = 50 µA to 100 µA
50
66
82
µA µs
VD ON
RON Voltage
0.35
0.65
0.95
V
TOFF_MIN
Minimum Off Time
FB = 1.24V
165
250
ns
FB = 0V
12
30
µs
TON MIN
Minimum On-time
400
ns
VEXTV
EXTVCC Voltage
3.30
3.65
4.00
V
ΔVEXTV
EXTVCC Load Regulation
IEXTV = 0 µA to 50 µA
0.03
0.5
%
VPWRGD
PGOOD Threshold (PGOOD Transition
With respect to VFB
91.5
93.5
95.5
%
from Low to High)
VPG_HYS
PGOOD Hysteresis
1
2.1
%
IOL
PGOOD Low Sink Current
VPGOOD = 0.4V
0.5
2
mA
IOH
PGOOD High Leakage Current
50
nA
IFB
Feedback Pin Bias Current
VFB = 1.2V
0
nA
ISS_SOURCE
Soft-Start Pin Source Current
VSS = 0V
0.7
1
1.4
µA
Copyright © 2005–2013, Texas Instruments Incorporated
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