LM2936-3.3
Ultra-Low Quiescent Current 3.3V Regulator
General Description
The LM2936-3.3 ultra-low quiescent current regulator fea-
tures low dropout voltage and low current in the standby
mode. With less than 20 A quiescent current at a 100 A
load, the LM2936-3.3 is ideally suited for automotive and
other battery operated systems. The LM2936-3.3 retains all
of the features that are common to low dropout regulators
including a low dropout PNP pass device, short circuit pro-
tection, reverse battery protection, and thermal shutdown.
The LM2936-3.3 has a 40V maximum operating voltage
limit, a -40C to +125C operating temperature range, and
3% output voltage tolerance over the entire output current,
input voltage, and temperature range. The LM2936-3.3 is
available in a TO-92 package, a SO-8 surface mount pack-
age, as well as SOT-223 and TO-252 surface mount power
packages.
Features
n
Ultra low quiescent current (I
Q
20 A for I
O
= 100 A)
n
Fixed 3.3V, 50 mA output
n
2% Initial output tolerance
n
3% Output tolerance over line, load, and temperature
n
Dropout voltage typically 200 mV
@
I
O
= 50 mA
n
Reverse battery protection
n
-50V reverse transient protection
n
Internal short circuit current limit
n
Internal thermal shutdown protection
n
40V operating voltage limit
n
60V operating voltage limit for LM2936HV
n
Shutdown pin available with LM2936BM package
Typical Application
10132401
* Required if regulator is located more than 2" from power supply filter capacitor.
** Required for stability. Must be rated for 22 F minimum over intended operating temperature range. Effective series resistance (ESR) is critical, see
curve. Locate capacitor as close as possible to the regulator output and ground pins. Capacitance may be increased without bound.
Connection Diagrams
TO-252
SOT-223
10132425
Top View
Order Number LM2936DT-3.3
See NS Package Number TD03B
10132426
Top View
Order Number LM2936MP-3.3
See NS Package Number MA04A
June 2002
LM2936-3.3
Ultra-Low
Quiescent
Current
3.3V
Regulator
2002 National Semiconductor Corporation
DS101324
www.national.com
Connection Diagrams
(Continued)
8-Pin SO (M)
TO-92
10132406
Top View
Order Number LM2936M-3.3
See NS Package Number M08A
10132402
Bottom View
Order Number LM2936Z-3.3
See NS Package Number Z03A
8-Pin SO (M)
8-Pin Mini SOIC (MM)
10132428
Top View
Order Number LM2936BM-3.3, LM2936HVBMA-3.3
See NS Package Number M08A
10132429
Top View
Order Number LM2936MM-3.3
See NS Package Number MUA08A
LM2936-3.3
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2
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Input Voltage (Survival)
+60V, -50V
ESD Susceptibility (Note 2)
2000V
Power Dissipation (Note 3)
Internally limited
Junction Temperature (T
Jmax
)
150C
Storage Temperature Range
-65C to +150C
Lead Temperature (Soldering, 10
sec.)
260C
Operating Ratings
Operating Temperature Range
-40C to +125C
Maximum Operating Input Voltage -
LM2936
+40V
Maximum Operating Input Voltage -
LM2936HV only
+60V
Maximum Shutdown Pin Voltage -
LM2936BM only
0V to 40V
MSO-8 (MUA08A)
JA
200C/W
TO-92 (Z03A)
JA
195C/W
SO-8 (M08A)
JA
140C/W
SO-8 (M08A)
JC
45C/W
TO-252 (TD03B)
JA
126C/W
TO-252 (TD03B)
JC
6C/W
SOT-223 (MA04A)
JA
149C/W
SOT-223 (MA04A)
JC
36C/W
Electrical Characteristics
V
IN
= 14V, I
O
= 10 mA, T
J
= 25C, unless otherwise specified. Boldface limits apply over entire operating temperature range
Parameter
Conditions
Min
(Note 5)
Typical
(Note 4)
Max
(Note 5)
Units
LM2936HV Only
Output Voltage
5.5V
V
IN
48V,
100 A
I
O
50 mA (Note 6)
3.201
3.300
3.399
V
Line Regulation
6V
V
IN
60V, I
O
= 1mA
10
30
mV
All LM2936
Output Voltage
3.234
3.300
3.366
V
4.0V
V
IN
26V,
100A
I
O
50mA (Note 6)
3.201
3.30
3.399
Quiescent Current
I
O
= 100 A, 8V
V
IN
24V
15
20
A
I
O
= 10 mA, 8V
V
IN
24V
0.20
0.50
mA
I
O
= 50 mA, 8V
V
IN
24V
1.5
2.5
mA
Line Regulation
9V
V
IN
16V
5
10
mV
6V
V
IN
40V, I
O
= 1 mA
10
30
Load Regulation
100 A
I
O
5 mA
10
30
mV
5 mA
I
O
50 mA
10
30
Dropout Voltage
I
O
= 100 A
0.05
0.10
V
I
O
= 50 mA
0.20
0.40
V
Short Circuit Current
V
O
= 0V
65
120
250
mA
Output Impedance
I
O
= 30 mAdc and 10 mArms,
450
m
f = 1000 Hz
Output Noise Voltage
10 Hz100 kHz
500
V
Long Term Stability
20
mV/1000
Hr
Ripple Rejection
V
ripple
= 1 V
rms
, f
ripple
= 120 Hz
-40
-60
dB
Reverse Polarity
R
L
= 500
, T = 1 ms
-50
-80
V
Transient Input Voltage
Output Voltage with
V
IN
= -15V, R
L
= 500
0.00
-0.30
V
Reverse Polarity Input
Maximum Line Transient
R
L
= 500
, V
O
3.63V
60
30
Output Bypass
Capacitance (C
OUT
) ESR
C
OUT
= 22F
0.1mA
I
OUT
50mA
0.3
8
LM2936-3.3
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3
Electrical Characteristics
(Continued)
V
IN
= 14V, I
O
= 10 mA, T
J
= 25C, unless otherwise specified. Boldface limits apply over entire operating temperature range
Parameter
Conditions
Min
(Note 5)
Typical
(Note 4)
Max
(Note 5)
Units
Shutdown Input - LM2936BM Only
Output Voltage, V
OUT
Output Off, V
SD
= 2.4V
0
0.010
V
Shutdown High Threshold
Voltage, V
IH
Output Off, R
LOAD
= 500
2.00
1.1
V
Shutdown Low Threshold
Voltage, V
IL
Output On, R
LOAD
= 500
1.1
0.60
V
Shutdown High Current, I
IH
Output Off, V
SD
= 2.4V, R
LOAD
= 500
12
A
Quiescent Current
Output Off, V
SD
= 2.4V, R
LOAD
= 500
Includes I
IH
Current
30
A
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating
the device beyond its specified operating ratings.
Note 2: Human body model, 100 pF discharge through a 1.5 k
resistor.
Note 3: The maximum power dissipation is a function of T
Jmax
,
JA
, and T
A
. The maximum allowable power dissipation at any ambient temperature is
P
D
= (T
Jmax
- T
A
)/
JA
. If this dissipation is exceeded, the die temperature will rise above 150C and the LM2936 will go into thermal shutdown.
Note 4: Typicals are at 25C (unless otherwise specified) and represent the most likely parametric norm.
Note 5: Tested limits are guaranteed to National's AOQL (Average Outgoing Quality Level) and 100% tested.
Note 6: To ensure constant junction temperature, pulse testing is used.
Typical Performance Characteristics
Maximum Power
Dissipation (TO-92)
Dropout Voltage
10132407
10132408
Dropout Voltage
Quiescent Current
10132409
10132410
LM2936-3.3
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