Electrical Characteristics (Continued)
VCC = 5V unless otherwise indicated. Typicals and limits appearing in plain type apply for TA=TJ=+25˚C. Limits appearing in
boldface type apply over full Operating Temperature Range. Datasheet min/max specification limits are guaranteed by design,
test, or statistical analysis.
Symbol
GATE DRIVE
IQ-BOOT
Parameter
Conditions
Min
Typ
Max
Units
BOOT Pin Quiescent Current
BOOTV = 12V, EN = 0
0˚C to +125˚C
95
95
160
215
µA
-40˚C to +125˚C
RDS1
RDS2
Top FET Driver Pull-Up ON
resistance
@
BOOT-SW = 5V 350mA
3
2
3
2
Ω
Ω
Ω
Ω
Top FET Driver Pull-Down ON
resistance
@
BOOT-SW = 5V 350mA
RDS3
Bottom FET Driver Pull-Up ON
resistance
@
BOOT-SW = 5V 350mA
RDS4
Bottom FET Driver Pull-Down
ON resistance
@
BOOT-SW = 5V 350mA
OSCILLATOR
RFADJ = 590kΩ
50
300
600
600
1400
2000
90
RFADJ = 88.7kΩ
RFADJ = 42.2kΩ, 0˚C to +125˚C
RFADJ = 42.2kΩ, -40˚C to +125˚C
RFADJ = 17.4kΩ
500
490
700
700
fOSC
PWM Frequency
Max Duty Cycle
kHz
%
RFADJ = 11.3kΩ
D
fPWM = 300kHz
fPWM = 600kHz
88
LOGIC INPUTS AND OUTPUTS
VSD-IH
VSD-IL
SD Pin Logic High Trip Point
SD Pin Logic Low Trip Point
2.6
1.6
1.6
3.5
V
V
0˚C to +125˚C
1.3
1.25
-40˚C to +125˚C
FB Voltage Going Down
0˚C to +125˚C
VPWGD-TH-LO PWGD Pin Trip Points
VPWGD-TH-HI PWGD Pin Trip Points
0.413
0.410
0.430
0.430
0.446
0.446
V
-40˚C to +125˚C
FB Voltage Going Up
0˚C to +125˚C
0.691
0.688
0.710
0.710
35
0.734
0.734
V
-40˚C to +125˚C
VPWGD-HYS PWGD Hysteresis (LM2737 only) FB Voltage Going Down FB Voltage
Going Up
mV
110
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for which the device
operates correctly. Opearting Ratings do not imply guaranteed performance limits.
Note 2: The human body model is a 100pF capacitor discharged through a 1.5k resistor into each pin.
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