Datasheet

LM2725, LM2726
SNVS144D –NOVEMBER 2000–REVISED MARCH 2013 www.ti.com
Electrical Characteristics
LM2725
VCC = CBOOT = 5V, SW = GND = 0V, unless otherwise specified. Typicals and limits appearing in plain type apply for T
A
=
T
J
= +25°C. Limits appearing in boldface type apply over the entire operating temperature range.
Symbol Parameter Condition Min Typ Max Units
POWER SUPPLY
I
q_op
Operating Quiescent Current PWM_IN = 0V 180 250 µA
I
q_sd
Shutdown Quiescent Current EN = 0V, PWM_IN = 0V 0.5 15 µA
TOP DRIVER
Peak Pull-Up Current Test Circuit 1, V
bias
= 5V, R =
1.2 A
0.1Ω
Pull-Up Rds_on I
CBOOT
= I
HG
= 0.7A 2.4 Ω
Peak Pull-down Current Test Circuit 2, V
bias
= 5V, R =
−1.0 A
0.1Ω
Pull-down Rds_on I
SW
= I
HG
= 0.7A 1.4 Ω
t
4
Rise Time Timing Diagram, C
LOAD
= 3.3nF 17 ns
t
6
Fall Time 10 ns
t
3
Pull-Up Dead Time Timing Diagram 23 ns
t
5
Pull-Down Delay Timing Diagram, from PWM_IN
21 ns
Falling Edge
BOTTOM DRIVER
Peak Pull-Up Current Test Circuit 3, V
bias
= 5V, R =
1.2 A
0.1Ω
Pull-up Rds_on I
VCC
= I
LG
= 0.7A 2.6 Ω
Peak Pull-down Current Test Circuit 4, V
bias
= 5V, R =
−2 A
0.1Ω
Pull-down Rds_on I
GND
= I
LG
= 0.7A 0.65 Ω
t
8
Rise Time Timing Diagram, C
LOAD
= 3.3nF 18 ns
t
2
Fall Time 6 ns
t
7
Pull-up Dead Time Timing Diagram 28 ns
t
1
Pull-down Delay Timing Diagram, from PWM_IN
15 ns
Rising Edge
LOGIC
V
uvlo_up
Power On Threshold VCC rises from 0V toward 5V 3.0 V
V
uvlo_dn
Under-Voltage-Lock-Out
2.5 V
Threshold
V
uvlo_hys
Under-Voltage-Lock-Out
0.5 V
Hysteresis
V
IH_EN
EN Pin High Input 2.4 V
V
IL_EN
EN Pin Low Input 0.8 V
I
leak_EN
EN Pin Leakage Current EN = VCC = 5V −2 2
µA
VCC = 5V, EN = 0V −2 2
t
on_min
Minimum Positive Input Pulse
Width 55
(1)
ns
t
off_min
Minimum Negative Input Pulse
Width 55
(2)
(1) If after a rising edge, a falling edge occurs sooner than the specified value, the IC may intermittently fail to turn on the bottom gate when
the top gate is off. As the falling edge occurs sooner and sooner, the driver may start to ignore the pulse and produce no output.
(2) If after a falling edge, a rising edge occurs sooner than the specified value, the IC may intermittently fail to turn on the top gate when the
bottom gate is off. As the rising edge occurs sooner and sooner, the driver may start to ignore the pulse and produce no output.
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