lm27212 National Semiconductor Corporation, lm27212 Datasheet - Page 6

• Manufacturer Part Number: lm27212
• Description: Two-phase Current-mode Hysteretic Buck Controller
• Manufacturer: National Semiconductor Corporation

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Chip Supply
Logic
Power Good
Output Voltage Slew Rate Control
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
type apply over a junction temperature range of -5˚C to +110˚C. Unless otherwise specified, VDD = 5V, SGND = DGND =
SRCK1 = 0V. (Note 5)
VDD
XPOK
SW1
VRON
DE_EN#
VOVP, VBOOT
VID0 to VID5
STP_CPU#, SLP
VSLP, VSTP, SENSE
CMP1, CMP2, CMPREF
ILIM1, ILIM21, ILIMREF
Power Dissipation
\TSSOP, TA = 25˚C,
(Note 2)
Symbol
I
I
SS1
SS2
VDD Shutdown Current
VDD Normal Operating
Current
UVLO Threshold
UVLO Hysteresis
VRON, STP_CPU#, XPOK
and SLP Input Logic
Low-to-High Transition
Threshold
VRON, STP_CPU#, XPOK
and SLP Input Logic
High-to-Low Transition
Threshold
CLK_EN# Sink Current
Power Good Upper Threshold
As a Percentage of VREF
Power Good Lower Threshold
As a Percentage of VREF
Hysteresis
Power Good Delay
PGOOD Sink Current
SS Pin Charging Current
During Soft Start
SS Pin Discharging Current
During Soft Shutdown
Parameter
-0.6V to 7V
-0.6V to 7V
-0.6V to 7V
-0.6V to 7V
-0.6V to 7V
-0.6V to 7V
-0.6V to 7V
-0.6V to 7V
-0.6V to 7V
-0.6V to 7V
-3V to 32V
Specifications with standard typeface are for T
VRON = 0V, VDD = 6V.
VRON = 3.3V.
VDD goes high from 0V.
VDD falls from above UVLO Threshold.
VRON, STP_CPU#, XPOK or SLP go high
from 0V.
VRON, STP_CPU#, XPOK or SLP fall from
3.3V.
CLK_EN# = 0.1V and asserted.
SENSE voltage goes high from 0V.
SENSE voltage falling from above VREF.
PGOOD = 0.1V and asserted.
SS = 0V.
(Note 1)
1.56W
Conditions
6
Operating Ratings
Junction Temperature
Functional Temp. Range
(Note 1)
ESD Rating (Note 4)
Storage Temp Range (Note
3)
Soldering Dwell Time
Temperature (Note 3)
VDD
Junction Temperature
Ambient Temperature
Wave
Infrared
Vapor Phase
J
= 25˚C, and those in bold face
0.99
84.5
Min
108
3.9
0.2
16
33
2
2
(Note 1)
0.35
1.43
Typ
112
-5˚C to +110˚C
-5˚C to +105˚C
4.1
1.9
3.2
3.6
87
22
45
1
3
2
3
-65˚C to +150˚C
-20˚C to +110˚C
4sec, 260˚C
4.75V to 6V
10sec, 240˚C
75sec, 219˚C
Max
2.31
90.5
116
4.2
4.3
+150˚C
10
32
57
2kV
Units
mA
mA
mA
µA
µA
µA
µs
%
%
%
V
V
V
V