Datasheet

LM2725, LM2726
www.ti.com SNVS144D –NOVEMBER 2000–REVISED MARCH 2013
Electrical Characteristics
LM2725 (continued)
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
V
IH_PWM
PWM_IN High Level Input When PWM_IN pin goes high
2.4
Voltage from 0V
V
V
IL_PWM
PWM_IN Low Level Input When PWM_IN pin goes low
0.8
Voltage from 5V
Electrical Characteristics
LM2726
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 185 250 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 =
3.0 A
0.1Ω
Pull-Up Rds_on I
CBOOT
= I
HG
= 1.0A 1.2 Ω
Peak Pull-down Current Test Circuit 2, V
bias
= 5V, R =
−3.2 A
0.1Ω
Pull-down Rds_on I
SW
= I
HG
= 1.0A 0.5 Ω
t
4
Rise Time Timing Diagram, C
LOAD
= 3.3nF 17 ns
t
6
Fall Time 12 ns
t
3
Pull-Up Dead Time Timing Diagram 19 ns
t
5
Pull-Down Delay Timing Diagram, from PWM_IN
27 ns
from Falling Edge
BOTTOM DRIVER
Peak Pull-Up Current Test Circuit 3, V
bias
= 5V, R =
3.2 A
0.1Ω
Pull-up Rds_on I
VCC
= I
LG
= 1.0A 1.1 Ω
Peak Pull-down Current Test Circuit 4, V
bias
= 5V, R =
−3.2 A
0.1Ω
Pull-down Rds_on I
GND
= I
LG
= 1.0A 0.6 Ω
t
8
Rise Time Timing Diagram, C
LOAD
= 3.3nF 17 ns
t
2
Fall Time 14 ns
t
7
Pull-up Dead Time Timing Diagram 12 ns
t
1
Pull-down Delay Timing Diagram, from PWM_IN
13 ns
Rising Edge
LOGIC
V
uvlo_up
Power On Threshold VCC rises from 0V toward 5V 2.8 V
V
uvlo_dn
Under-Voltage-Lock-Out
2.5 V
Threshold
V
uvlo_hys
Under-Voltage-Lock-Out
0.3 V
Hysteresis
V
IH_EN
EN Pin High Input 2.4 V
V
IL_EN
EN Pin Low Input 0.25 V
I
leak_EN
EN Pin Leakage Current EN = VCC = 5V −2 2
µA
VCC = 5V, EN = 0V −2 2
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