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Absolute Maximum Ratings
2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V (SW, FB, R1- 2, G1-2,
B1-2) pins:
Voltage to GND (Notes 3, 4)
V
, V
, V
DD1
DD2
DD_IO
Voltage on Logic Pins
I (R1, G1, B1, R2, G2, B2)
(Note 5)
I (V
)
REF
Continuous Power Dissipation
(Note 6)
Junction Temperature (T
Storage Temperature Range
Maximum Lead Temperature
(Reflow soldering, 3 times)
(Note 7)
Electrical Characteristics
Limits in standard typeface are for T
(−40˚C ≤ T
≤ +85˚C). Unless otherwise noted, specifications apply to the LP3931 Typical Application Circuit (pg. 1) with: V
J
= V
= V
= 2.775V, C
DD2
DDIO
(Note 12).
Symbol
Parameter
I
Standby Supply Current
DD
(V
and V
DD1
DD2
No-Load Supply Current
(V
and V
DD1
DD2
Full Load Supply Current
(V
and V
DD1
DD2
I
V
Standby Supply Current
DD_IO
DD_IO
V
Supply Current
DD_IO
V
Reference Voltage (Note 13)
REF
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation of
the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the
Electrical Characteristics tables.
Note 2: All voltages are with respect to the potential at the GND pins (GND1-3, GND_BOOST, GND_RGB).
Note 3: Battery/Charger voltage should be above 6V no more than 10% of the operational lifetime.
Note 4: Voltage tolerance of LP3931 above 6.0V relies on fact that V
(ON) at all conditions, National Semiconductor does not guarantee any parameters or reliability for this device.
Note 5: The total load current of the boost converter should be limited to 300 mA.
Note 6: Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at T
140˚C (typ.).
Note 7: For detailed package and soldering specifications and information, please refer to National Semiconductor Application Note 1187: Leadless Leadframe
Package (LLP).
Note 8: The Human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged
directly into each pin. MIL-STD-883 3015.7.
www.national.com
(Notes 1,
−0.3V to +7.2V
−0.3V to +6.0V
–0.3V to V
DD_IO
+0.3V, with 6.0V max
150 mA
10 µA
Internally Limited
)
125˚C
J-MAX
−65˚C to +150˚C
240˚C
(Notes 2, 11)
= 25˚C. Limits in boldface type apply over the operating ambient temperature range
J
= C
= C
= 0.1 µF, C
VDD1
VDD2
VDDIO
NSTBY = L (register)
current)
SCK, SS, SI, NRST = H
NSTBY = H (reg.)
current, boost off)
EN_BOOST = L (reg.)
SCK, SS, SI, NRST = H
NSTBY = H (reg.)
current, boost on)
EN_BOOST = H (reg.)
SCK, SS, SI, NRST = H
All Outputs Active
NSTBY = L (reg.)
SCK, SS, SI, NRST = H
1 MHz SCK Frequency
C
L
I (V
Test Purposes Only
ESD Rating (Note 8)
Human Body Model:
Machine Model:
Operating Ratings
V (SW, FB, R1-2, G1-2, B1-2)
V
, V
(Note 4)
DD1
DD2
V
DD_IO
Recommended Load Current
Junction Temperature (T
Ambient Temperature (T
(Note 9)
Thermal Properties
Junction-to-Ambient Thermal Resistance (θ
SQA24A Package (Note 10)
= C
= 10 µF, C
OUT
IN
Condition
= 50 pF at SO Pin
) ≤ 1 nA,
REF
and V
(2.775V) are available (ON) at all conditions. If V
DD1
DD2
4
(Notes 1, 2)
3.0V to 6.0V
2.65V to 2.9V
1.8V to V
0 mA to 300 mA
) Range
−40˚C to +125˚C
J
) Range
A
−40˚C to +85˚C
),
JA
= 0.1 µF, L
= 10 µH, R
VREF
1
Min
Typ
Max
1
5
170
250
1
1
20
1.205
1.23
1.255
−2
+2
and V
are not available
DD1
DD2
= 160˚C (typ.) and disengages at T
J
2 kV
200V
DD1,2
39˚C/W
DD1
= 82k
T
Units
µA
µA
mA
µA
µA
V
%
=
J
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