LP3971 Datasheet, PDF (7/42 Pages) National Semiconductor (TI) – POWER MANAGEMENT UNIT FOR ADVANCED APPLICATION PROCESSORS

Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
All Inputs
GND to GND SLUG
Junction Temperature (T_J-MAX)
Storage Temperature
Power Dissipation
(T_A = 70˚C) (Note 3)
Junction-to-Ambient Thermal
Resistance θ_JA (Note 3)
Maximum Lead Temp (Soldering)
−0.3V to +6V
±0.3V
150˚C
−65˚C to +150˚C
3.2W
25˚C/W
260˚C
ESD Rating (Note 5)
Human Body Model
Machine Model
Operating Ratings
V_IN
V_EN
Junction Temperature (T_J)
Operating Temperature (T_A)
Maximum Power Dissipation
(T_A = 70˚C) (Notes 3, 4)
2 kV
200V
2.7V to 5.5V
0 to (V_IN + 0.3V)
−40˚C to +125˚C
−40˚C to +85˚C
2.2W
General Electrical Characteristics Typical values and limits appearing in normal type apply for T_J =
25˚C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40˚C to +125˚C.
(Notes 2, 6)
Symbol
Parameter
V_IN, VDDA, V_IN Buck1, 2 and Battery Voltage
3
V_INLDO4, V_INLDO5
T_SD
Power Supply for LDO 4 and 5
Thermal Shutdown (Note 14)
**No input supply should be higher then VDDA
Conditions Min
Typ
Max
Units
2.7
3.6
5.5
V
1.74
3.6
5.5
V
Temperature
160
˚C
Hysteresis
20
Supply Specification (Notes 2, 6)
Supply
LDO_RTC
LDO1
LDO2
LDO3
LDO4
LDO5
BUCK 1
BUCK 2
BUCK 3
V_OUT (Volts)
Range (V)
Tracking (Note 10)
1.8 to 3.3
1.8 to 3.3
1.8 to 3.3
1.0 to 3.3
1.0 to 3.3
0.8 to 3.3
0.8 to 3.3
0.8 to 3.3
Resolution (mV)
N/A
100
100
100
50-600
50-600
50-600
50-600
50-600
I_MAX
Maximum Output
Current (mA) (Note 14)
30 or 10
300
150
150
150
370
1600
1600
1600
Defaults (Notes 2, 6)
‘A’ Version
Supply
(V)
Enable ‘A’
LDO_RTC
2.8
…
LDO1
1.8
SYS_EN
LDO2
1.8
SYS_EN
LDO3
3.0
SYS_EN
LDO4
3.0
SYS_EN
LDO5
1.4
PWR_EN
BUCK1
1.4
PWR_EN
BUCK2
3.3
SYS_EN
BUCK3
1.8
SYS_EN
**Version-A LDO Tracking Disabled, Version-B LDO Tracking Enabled
7
‘B’ Version
(V)
Enable ‘B’
2.8
…
3.0
SYS_EN
3.0
SYS_EN
3.0
SYS_EN
1.3
PWR_EN
1.1
PWR_EN
1.4
PWR_EN
3.0
SYS_EN
1.8
SYS_EN
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