LM34919C-Q1 Datasheet, PDF (4/29 Pages) Texas Instruments – LM34919C-Q1 Ultra Small 50V, 600 mA Constant On-Time Buck Switching Regulator

LM34919C-Q1
SNVS831A – SEPTEMBER 2013 – REVISED DECEMBER 2013
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Electrical Characteristics (continued)
Unless otherwise specified, these specifications apply for –40°C ≤ T_J ≤ +125°C, V_IN = 12 V, R_ON = 100 kΩ. Typical values
represent the most likely parametric norm at T_J = 25°C, and are provided for reference purposes only.
Symbol
Parameter
Conditions
Min Typ Max Units
Regulation and Over-Voltage Comparators (FB Pin)
V_REF
FB Regulation
Threshold
FB Over-Voltage
Threshold
SS pin = Steady State
2.47 2.52 2.57
V
3.0
FB Bias Current
FB = 3 V
1
nA
Power Good Feature (PGD Pin)
PGD_UV
PGD_OV
PGD UV Threshold
Rising, With Respect
to V_REF
PGD UV Threshold
Falling
PGD OV Threshold
Rising
FB Increasing
FB Decreasing
FB Increasing
87 92 97
90
%
120
PGD OV Threshold
Falling
FB Decreasing
110
T_{d, PGD}
I_PGD
Thermal Shutdown
PGD Delay
PGD Pulldown
Falling Edge
Vin = 4.5 V, FB = 3 V, Vpg = 0.1 V
10
us
1
mA
T_SD
Thermal Shutdown
Temperature
Thermal Shutdown
Hysteresis
175
°C
20
Thermal Resistance
θ_JA
Junction to Ambient
0 LFPM Air Flow
(DSBGA Packages)
For WSON Package
(Exposed Pad)
61
°C/W
50
4
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