LP3905 Datasheet, PDF (4/15 Pages) National Semiconductor (TI) – Power Management Unit For Low Power Handheld Applications

Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V_IN1,V_IN2
FB1, FB2, EN1,EN2
Continuous Power Dissipation
(Note 3)
Junction Temperature (T_J-MAX)
Storage Temperature Range
Maximum Lead Temperature
(Soldering, 10 sec.)
ESD Rating (Note 4)
Human Body Model:
−0.2V to 6.0V
(GND−0.2V) to
(V_IN + 0.2V) to 6.0V
(max)
Internally Limited
+150˚C
−65˚C to +150˚C
260˚C
2.5kV
Operating Ratings (Notes 1, 2)
V_IN1 (Buck1&2 Input
Voltage),V_IN2 (LDO1&2 Input
Voltage) (Note 7)
Recommended Load Current
(Buck)
Recommended Load Current
(LDO)
Junction Temperature (T_J)
Range
Ambient Temperature (T_A)
Range (Note 5)
3V to 5.5V
0mA to 600 mA
0mA to 100mA with
0.47uF O/P cap
0mA to 150mA with
1.0uF O/P cap
−40˚C to +125˚C
−40˚C to +85˚C
Thermal Properties
Junction-to-Ambient
Thermal Resistance (θ_JA)
SDA14B package(Note 6)
37.3^oC/W
General Electrical Characteristics (Notes 2, 8, 9)
Limits in standard typeface are for T_J = 25˚C. Limits in boldface type apply over the full junction temperature range (−40˚C ≤
T_J ≤ +125˚C). Unless otherwise noted, specifications apply to the LP3905 Typical Application Circuit (Figure. 1)
Symbol
Parameter
Condition
Min
Typ Max
Units
Login Input Thresholds
V_IN
Input Voltage Range
3
5.5
V
I_Q
Shutdown Supply Current
All Circuits OFF except for POR and
6.5
10.0
µA
UVLO
No load Supply Current (Note 15) LDO1 & 2 and Buck1 & 2 on
140
250
( PWM only versions ) LDO1 & 2
7
10.0
mA
and Buck1 & 2 on
V_IH
V_IL
I_EN
V_UVLO-R
T_SHUTDOWN
Logic High Input
Logic Low Input
Enable (EN1,2) Input Current
(Note 14)
Battery Under Voltage Lock-Out
Thermal Shutdown (Note 15)
V_IN = 3.0V to 5.5V
V_IN = 3.0V to 5.5V
EN1/EN2 = 5.5V and V_IN= 5.5V
EN1/EN2 = 0V and V_IN= 5.5V
V_IN Rising
Temperature
Hysteresis
1.2
V
0.4
V
2.1
5
8.5
µA
0.001 0.1
µA
2.7
3.1
V
160
˚C
20
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