LP5996 Dual Linear Regulator with 300mA and 150mA Outputs
January 11, 2008
LP5996
Dual Linear Regulator with 300mA and 150mA Outputs
General Description
The LP5996 is a dual low dropout regulator. The first regulator
can source 150mA, while the second is capable of sourcing
300mA.
The LP5996 provides 1.5% accuracy requiring an ultra low
quiescent current of 35µA. Separate enable pins allow each
output of the LP5996 to be shut down, drawing virtually zero
current.
The LP5996 is designed to be stable with small footprint ce-
ramic capacitors down to 1µF.
The LP5996 is available in fixed output voltages and comes
in a 10 pin, 3mm x 3mm, LLP package. .
Key Specifications
■
■
■
■
Input Voltage Range
Low Dropout Voltage
Ultra-Low I
Q
(enabled)
Virtually Zero I
Q
(disabled)
2.0V to 6.0V
210mV at 300mA
35µA
<10nA
Package
All available in Lead Free option.
10 pin LLP 3mm x 3mm
For other package options contact your NSC sales office.
Applications
■
Cellular Handsets
■
PDA's
■
Wireless Network Adaptors
Features
■
2 LDO Outputs with Independent Enable
■
1.5% Accuracy at Room Temperature, 3% over
Temperature
■
Thermal Shutdown Protection
■
Stable with Ceramic Capacitors
Typical Application Circuit
20171501
© 2008 National Semiconductor Corporation
201715
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LP5996
Functional Block Diagram
20171506
Pin Descriptions
LLP-10 Package
Pin No
1
2
3
4
Symbol
V
IN
EN1
EN2
C
BYP
Name and Function
Voltage Supply Input. Connect a 1µF capacitor between this pin
and GND.
Enable Input to Regulator 1. Active high input.
High = On. Low = OFF.
Enable Input to Regulator 2. Active high input.
High = On. Low = OFF.
Internal Voltage Reference Bypass. Connect a 10nF capacitor
from this pin to GND to reduce noise and improve line transient
and PSRR.
This pin may be left open.
No Connection. Do not connect to any other pin.
Common Ground pin. Connect externally to exposed pad.
No Connection. Do not connect to any other pin.
No Connection. Do not connect to any other pin.
Output of Regulator 2. 300mA maximum current output. Connect
a 1µF capacitor between this pin to GND.
Output of Regulator 1. 150mA maximum current output. Connect
a 1µF capacitor between this pin to GND.
Common Ground. Connect to Pin 6.
5
6
7
8
9
10
Pad
N/C
GND
N/C
N/C
V
OUT2
V
OUT1
GND
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2
LP5996
Connection Diagram
LLP-10 Package
20171503
See NS package number SDA10A
3
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LP5996
Ordering Information (LLP-10)
For other voltage options, please contact your local NSC sales office.
Output Voltage (V)
Vout1
0.8
Vout2
3.3
Order Number
LP5996SD-0833
LP5996SDX-0833
LP5996SD-0833
LP5996SDX-0833
1.0
1.8
LP5996SD-1018
LP5996SDX-1018
LP5996SD-1018
LP5996SDX-1018
1.5
2.5
LP5996SD-1525
LP5996SDX-1525
LP5996SD-1525
LP5996SDX-1525
1.8
3.3
LP5996SD-1833
LP5996SDx-1833
LP5996SD-1833
LP5996SDx-1833
2.5
3.3
LP5996SD-2533
LP5996SDx-2533
LP5996SD-2533
LP5996SDx-2533
2.8
2.8
LP5996SD-2828
LP5996SDX-2828
LP5996SD-2828
LP5996SDX-2828
3.0
3.0
LP5996SD-3030
LP5996SDX-3030
LP5996SD-3030
LP5996SDX-3030
3.0
3.3
LP5996SD-3033
LP5996SDX3033
LP5996SD-3033
LP5996SDX3033
3.3
0.8
LP5996SD-3308
LP5996SDX-3308
LP5996SD-3308
LP5996SDX-3308
3.3
3.3
LP5996SD-3333
LP5996SDX-3333
LP5996SD-333
LP5996SDX-3333
NOPB
NOPB
L182B
NOPB
NOPB
L205B
NOPB
NOPB
L179B
NOPB
NOPB
L181B
NOPB
NOPB
L180B
NOPB
NOPB
L226B
NOPB
NOPB
L225B
NOPB
NOPB
L177B
NOPB
NOPB
L224B
Spec
NOPB
NOPB
Package Marking
L176B
Supplied As
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Reel
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Re
1000 Units, Tape-and-Reel
4500 Units, Tape-and-Re
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4
LP5996
Absolute Maximum Ratings
(Notes 1, 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Input Voltage
V
OUT1
, V
OUT2
, EN1, and EN2
Voltage to GND
Junction Temperature (T
J-MAX
)
Lead/Pad Temp. (Note 3)
Storage Temperature
Continuous Power Dissipation
Internally Limited(Note 4)
ESD Rating(Note 5)
-0.3V to 6.5V
-0.3V to (V
IN
+ 0.3V) with
6.5V (max)
150°C
235°C
-65°C to 150°C
Human Body Model
Machine Model
2.0kV
200V
(Notes 1, 2)
2.0V to 6.0V
0 to (V
IN
+ 0.3V) to
6.0V (max)
-40°C to 125°C
-40°C to 85°C
Operating Ratings
Input Voltage
EN1, EN2 Voltage
Junction Temperature
Ambient Temperature T
A
Range
(Note 6)
Thermal Properties
Junction To Ambient Thermal
Resistance(Note 7)
θ
JA
LLP-10 Package
(Note 1)
55°C/W
(Notes 2, 8)
Unless otherwise noted, V
EN
= 950mV, V
IN
= V
OUT
+ 1.0V, or 2.0V, whichever is higher, where V
OUT
is the higher of V
OUT1
and
V
OUT2
. C
IN
= 1 µF, I
OUT
= 1 mA, C
OUT1
= C
OUT2
= 1.0µF.
Typical values and limits appearing in normal type apply for T
A
= 25°C. Limits appearing in
boldface
type apply over the full junction
temperature range for operation, −40 to +125°C.
Symbol
V
IN
ΔV
OUT
Parameter
Input Voltage
Output Voltage Tolerance
(Note 9)
I
OUT
= 1mA
1.5V < V
OUT
≤
3.3V
V
OUT
≤
1.5V
Line Regulation Error
Load Regulation Error
V
IN
= (V
OUT(NOM)
+ 1.0V) to 6.0V
I
OUT
= 1mA to 150mA
(LDO 1)
I
OUT
= 1mA to 300mA
(LDO 2)
V
DO
Dropout Voltage
(Note 10)
I
OUT
= 1mA to 150mA
(LDO 1)
I
OUT
= 1mA to 300mA
(LDO 2)
I
Q
Quiescent Current
LDO 1 ON, LDO 2 ON
I
OUT1
= I
OUT2
= 0mA
LDO 1 ON, LDO 2 OFF
I
OUT1
= 150mA
LDO 1 OFF, LDO 2 ON
I
OUT2
= 300mA
LDO 1 ON, LDO 2 ON
I
OUT1
= 150mA, I
OUT2
= 300m
V
EN1
= V
EN2
= 0.4V
I
SC
I
OUT
Short Circuit Current Limit
Maximum Output Current
LDO 1
LDO 2
LDO 1
LDO 2
0.03
85
26
110
210
35
45
45
70
0.5
420
550
150
300
Conditions
Typ
Limit
Min
2
-2.5
-3.75
-2.75
-4
Max
6
+2.5
+3.75
+2.75
+4
0.3
155
µV/mA
85
220
mV
550
100
110
µA
110
170
10
750
840
nA
mA
mA
Units
V
Electrical Characteristics
%
%/V
5
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