lm25117psqx National Semiconductor Corporation, lm25117psqx Datasheet - Page 5

• Manufacturer Part Number: lm25117psqx
• Description: Wide Input Range Synchronous Buck Controller With Analog Current Monitor
• Manufacturer: National Semiconductor Corporation

VIN Supply
VCC Regulator
VCC Disable
UVLO
Soft Start
Error Amplifier
PWM Comparator
I
SHUTDOWN
V
Symbol
VIN to AGND
SW to AGND
HB to SW
VCC to AGND
HO to SW
LO to AGND
FB, DEMB, RES, VCCDIS,
UVLO to AGND
CM, COMP to
Absolute Maximum Ratings
Electrical Characteristics
junction temperature range of -40°C to +125°C. Minimum and Maximum limits are guaranteed through test, design, or statistical
correlation. Typical values represent the most likely parametric norm at T
Unless otherwise specified, the following conditions apply: V
t
HO(OFF)
CC(REG)
V
I
I
V
V
A
BIAS
f
VCC
I
BW
SS
REF
OH
OL
OL
Parameter
VIN Operating Current
VIN Shutdown Current
VCC Regulation
VCC Dropout (VIN to VCC)
VCC Sourcing Current Limit
VCC Operating Current
VCC Under-voltage Threshold
VCC Under-voltage Hysteresis
VCCDIS Threshold
VCCDIS Hysteresis
VCCDIS Input Current
VCCDIS Pull-down Resistance
UVLO Threshold
UVLO Hysteresis Current
UVLO Shutdown Threshold
UVLO Shutdown Hysteresis
SS Current Source
SS Pull-down Resistance
FB Reference Voltage
FB Input Bias Current
COMP Output High Voltage
COMP Output Low Voltage
DC Gain
Unity Gain Bandwidth
Forced HO Off-time
AGND(Note
(Note
2)
3)
(Note
(Note
6)
6)
-0.3 to VCC+0.3V
-0.3 to HB+0.3V
Limits in standard type are for T
(Note
Conditions
V
V
V
No Load
V
V
V
V
V
VCC Rising
VCCDIS Rising
V
UVLO Rising
V
UVLO Falling
V
Measured at FB, FB = COMP
V
I
I
SOURCE
SINK
-0.3 to 45V
-3.0 to 45V
-0.3 to 15V
-0.3 to 15V
-0.3 to 15V
SS
SS
SS
VIN
VIN
VCC
SS
SS
VCCDIS
UVLO
SS
FB
-0.3 to 7V
= 0.8V
= 0V
= 0V, V
= 0V, V
= 0V, V
= 0V, V
= 0V
= 4.5V, No external load
= 5.0V, I
= 3mA
1)
= 0V
= 1.4V
= 0V
= 3mA
VCCDIS
UVLO
VCCDIS
VCCDIS
VIN
CC
= 24V, V
5
= 20mA
= 0V
= 2V
= 2V
= 2V, V
SS, RAMP, RT to AGND
CS, CSG, PGND, to AGND
ESD Rating HBM
Storage Temperature
Junction Temperature
Operating Ratings
VIN
VCC
HB to SW
Junction Temperature
VCCDIS
(Note
J
= 25°C, and are provided for reference purposes only.
VCC
J
= 25°C only; limits in boldface type apply over the
= 14V
= 0V, R
5)
(Note
T
= 25kΩ, no load on LO & HO.
4)
6.85
3.75
1.22
1.22
Min
788
260
0.3
2.8
30
15
7
(Note
0.05
1.25
0.06
1.25
Typ
500
800
320
4.8
0.4
7.6
0.4
4.0
5.8
4.0
0.2
-20
0.4
0.1
16
42
20
10
13
80
1
3
1)
-40°C to +125°C
-55°C to +150°C
Max
0.55
0.14
4.15
1.29
1.29
0.26
812
440
6.2
8.2
0.5
5.0
7.3
40
25
12
24
4.5V to 42V
4.5V to 14V
4.5V to 14V
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-0.3 to 0.3V
-0.3 to 7V
+150°C
Units
MHz
mA
mA
mA
mA
mA
mV
kΩ
µA
nA
µA
µA
nA
dB
2kV
ns
Ω
V
V
V
V
V
V
V
V
V
V
V
V