Order this document by LM2931/D
LM2931
Series
LOW DROPOUT
VOLTAGE REGULATORS
Z SUFFIX
PLASTIC PACKAGE
CASE 29
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2.
DT1 SUFFIX
PLASTIC PACKAGE
CASE 369
(DPAK)
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK)
Pin 1. Output
2. Ground
3. Input
Pin 1. Input
2. Ground
3. Output
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
3
1
2
DT SUFFIX
PLASTIC PACKAGE
CASE 369A
(DPAK)
3
1
2
FIXED OUTPUT VOLTAGE
3
1
2
3
1
2
3
1
1
MOTOROLA ANALOG IC DEVICE DATA
Low Dropout
Voltage Regulators
The LM2931 series consists of positive fixed and adjustable output
voltage regulators that are specifically designed to maintain proper
regulation with an extremely low inputtooutput voltage differential. These
devices are capable of supplying output currents in excess of 100 mA and
feature a low bias current of 0.4 mA at 10 mA output.
Designed primarily to survive in the harsh automotive environment, these
devices will protect all external load circuitry from input fault conditions
caused by reverse battery connection, two battery jump starts, and
excessive line transients during load dump. This series also includes internal
current limiting, thermal shutdown, and additionally, is able to withstand
temporary powerup with mirrorimage insertion.
Due to the low dropout voltage and bias current specifications, the
LM2931 series is ideally suited for battery powered industrial and consumer
equipment where an extension of useful battery life is desirable. The `C'
suffix adjustable output regulators feature an output inhibit pin which is
extremely useful in microprocessorbased systems.
InputtoOutput Voltage Differential of < 0.6 V @ 100 mA
Output Current in Excess of 100 mA
Low Bias Current
60 V Load Dump Protection
50 V Reverse Transient Protection
Internal Current Limiting with Thermal Shutdown
Temporary MirrorImage Protection
Ideally Suited for Battery Powered Equipment
Economical 5Lead TO220 Package with Two Optional Leadforms
Available in Surface Mount SOP8, D2PAK and DPAK Packages
High Accuracy (
2%) Reference (LM2931AC) Available
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SOP8)
1
8
ADJUSTABLE
FIXED
(Top View)
N.C.
Gnd
Input
N.C.
Gnd
Output
1
8
5
4
(Top View)
Output
Inhibit
Gnd
Input
Adjust
Gnd
Output
1
8
5
4
TV SUFFIX
PLASTIC PACKAGE
CASE 314B
T SUFFIX
PLASTC PACKAGE
CASE 314D
TH SUFFIX
PLASTIC PACKAGE
CASE 314A
D2T SUFFIX
PLASTIC PACKAGE
CASE 936A
(D2PAK)
Heatsink surface connected to Pin 3.
Pin 1. Adjust
2. Output Inhibit
3. Ground
4. Input
5. Output
Heatsink surface (shown as
terminal 6 in case outline
drawing) is connected to Pin 3.
5
1
5
1
5
1
5
1
ADJUSTABLE OUTPUT VOLTAGE
(See Following Page for Ordering Information.)
Motorola, Inc. 1997
Rev 4
LM2931 Series
2
MOTOROLA ANALOG IC DEVICE DATA
ORDERING INFORMATION
D
i
Output
C
P
k
Device
Voltage
Tolerance
Case
Package
LM2931AD5.0
5 0 V
3 8%
751
SOP8 Surface Mount
LM2931ADT5.0
5 0 V
3 8%
369A
Surface Mount DPAK
LM2931ADT15.0
5 0 V
38%
369
DPAK
LM2931AD2T5.0
5 0 V
3.8%
936
Surface Mount D2PAK
LM2931AT5.0
5 0 V
221A
TO220 Type
LM2931AZ5.0
5 0 V
29
TO92 Type
LM2931D5.0
5.0 V
5 0%
751
SOP8 Surface Mount
LM2931D2T5.0
5 0%
936
Surface Mount D2PAK
LM2931DT5.0
5 0%
369A
Surface Mount DPAK
LM2931DT15.0
5 0%
369
DPAK
LM2931T5.0
5 0%
221A
TO220 Type
LM2931Z5.0
5.0%
29
TO92 Type
LM2931CD
Adj
bl
751
SOP8 Surface Mount
LM2931CD2T
Adj
bl
936A
Surface Mount D2PAK
LM2931CT
Adjustable
314D
5Pin TO220 Type
LM2931CTH
j
314A
5Pin Horizontal Leadform
LM2931CTV
314B
5Pin Vertical Leadform
LM2931ACD
Adj
bl
2 0%
751
SOP8 Surface Mount
LM2931ACD2T
Adj
bl
2 0%
936A
Surface Mount D2PAK
LM2931ACT
Adjustable
2.0%
314D
5Pin TO220 Type
LM2931ACTH
314A
5Pin Horizontal Leadform
LM2931ACTV
314B
5Pin Vertical Leadform
Representative Schematic Diagram
*Deleted on Adjustable Regulators
Input
Output
30 k *
Adjust
92.8 k *
Ground
350
500
6.0 k
6.0
30 k
Output
Inhibit
EPI
Bias
50 k
5.8 V
10 k
11.5 k
3.0 k
3.94 k
30 k
30 k
180 k
184 k
6.8 V
35 k
48 k
This device contains 26 active transistors.
LM2931 Series
3
MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Input Voltage Continuous
VI
40
Vdc
Transient Input Voltage (
100 ms)
VI(
)
60
Vpk
Transient Reverse Polarity Input Voltage
VI(
)
50
Vpk
1.0% Duty Cycle,
100 ms
Power Dissipation
Case 29 (TO92 Type)
TA = 25
C
PD
Internally Limited
W
Thermal Resistance, JunctiontoAmbient
R
JA
178
C/W
Thermal Resistance, JunctiontoCase
R
JC
83
C/W
Case 221A, 314A, 314B and 314D (TO220 Type)
TA = 25
C
PD
Internally Limited
W
Thermal Resistance, JunctiontoAmbient
R
JA
65
C/W
Thermal Resistance, JunctiontoCase
R
JC
5.0
C/W
Case 369 and 369A (DPAK) [Note 1]
TA = 25
C
PD
Internally Limited
W
Thermal Resistance, JunctiontoAmbient
R
JA
92
C/W
Thermal Resistance, JunctiontoCase
R
JC
6.0
C/W
Case 751 (SOP8) [Note 2]
TA = 25
C
PD
Internally Limited
W
Thermal Resistance, JunctiontoAmbient
R
JA
160
C/W
Thermal Resistance, JunctiontoCase
R
JC
25
C/W
Case 936 and 936A (D2PAK) [Note 3]
TA = 25
C
PD
Internally Limited
W
Thermal Resistance, JunctiontoAmbient
R
JA
70
C/W
Thermal Resistance, JunctiontoCase
R
JC
5.0
C/W
Tested Operating Junction Temperature Range
TJ
40 to +125
C
Storage Temperature Range
Tstg
65 to +150
C
NOTES: 1. DPAK JunctiontoAmbient Thermal Resistance is for vertical mounting. Refer to Figure 24 for
board mounted Thermal Resistance.
2. SOP8 JunctiontoAmbient Thermal Resistance is for minimum recommended pad size. Refer
to Figure 23 for Thermal Resistance variation versus pad size.
3. D2PAK JunctiontoAmbient Thermal Resistance is for vertical mounting. Refer to Figure 25 for
board mounted Thermal Resistance.
4. ESD data available upon request.
ELECTRICAL CHARACTERISTICS
(Vin = 14 V, IO = 10 mA, CO = 100
F, CO(ESR) = 0.3
, TJ = 25
C [Note 1].)
Ch
i i
S
b l
LM29315.0
LM2931A5.0
U i
Characteristic
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
FIXED OUTPUT
Output Voltage
VO
V
Vin = 14 V, IO = 10 mA, TJ = 25
C
4.75
5.0
5.25
4.81
5.0
5.19
Vin = 6.0 V to 26 V, IO
100 mA, TJ = 40
to +125
C
4.50
5.50
4.75
5.25
Line Regulation
Regline
mV
Vin = 9.0 V to 16 V
2.0
10
2.0
10
Vin = 6.0 V to 26 V
4.0
30
4.0
30
Load Regulation (IO = 5.0 mA to 100 mA)
Regload
14
50
14
50
mV
Output Impedance
ZO
m
IO = 10 mA,
IO = 1.0 mA, f = 100 Hz to 10 kHz
200
200
Bias Current
IB
mA
Vin = 14 V, IO = 100 mA, TJ = 25
C
5.8
30
5.8
30
Vin = 6.0 V to 26 V, IO = 10 mA, TJ = 40
to +125
C
0.4
1.0
0.4
1.0
Output Noise Voltage (f = 10 Hz to 100 kHz)
Vn
700
700
Vrms
Long Term Stability
S
20
20
mV/kHR
NOTES: 1. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
2. The reference voltage on the adjustable device is measured from the output to the adjust pin across R1.
LM2931 Series
4
MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS
(Vin = 14 V, IO = 10 mA, CO = 100
F, CO(ESR) = 0.3
, TJ = 25
C [Note 1].)
Ch
i i
S
b l
LM29315.0
LM2931A5.0
U i
Characteristic
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
FIXED OUTPUT
Ripple Rejection (f = 120 Hz)
RR
60
90
60
90
dB
Dropout Voltage
VIVO
V
IO = 10 mA
0.015
0.2
0.015
0.2
IO = 100 mA
0.16
0.6
0.16
0.6
OverVoltage Shutdown Threshold
Vth(OV)
26
29.5
40
26
29.5
40
V
Output Voltage with Reverse Polarity Input (Vin = 15 V)
VO
0.3
0
0.3
0
V
ELECTRICAL CHARACTERISTICS
(Vin = 14 V, IO = 10 mA, CO = 100
F, CO(ESR) = 0.3
, TJ = 25
C [Note 1].)
LM2931C
LM2931AC
Characteristic
Symbol
Min
Typ
Max
Min
Typ
Typ
Unit
ADJUSTABLE OUTPUT
Reference Voltage (Note 2, Figure 18)
Vref
V
IO = 10 mA, TJ = 25
C
1.14
1.20
1.26
1.17
1.20
1.23
IO
100 mA, TJ = 40 to +125
C
1.08
1.32
1.15
1.25
Output Voltage Range
VO range
3.0 to
24
2.7 to
29.5
3.0 to
24
2.7 to
29.5
V
Line Regulation (Vin = VO + 0.6 V to 26 V)
Regline
0.2
1.5
0.2
1.5
mV/V
Load Regulation (IO = 5.0 mA to 100 mA)
Regload
0.3
1.0
0.3
1.0
%/V
Output Impedance
ZO
m
/
V
IO = 10 mA,
IO = 1.0 mA, f = 10 Hz to 10 kHz
40
40
Bias Current
IB
mA
IO = 100 mA
6.0
6.0
IO = 10 mA
0.4
1.0
0.4
1.0
Output Inhibited (Vth(OI) = 2.5 V)
0.2
1.0
0.2
1.0
Adjustment Pin Current
IAdj
0.2
0.2
A
Output Noise Voltage (f = 10 Hz to 100 kHz)
Vn
140
140
Vrms/V
LongTerm Stability
S
0.4
0.4
%/kHR
Ripple Rejection (f = 120 Hz)
RR
0.10
0.003
0.10
0.003
%/V
Dropout Voltage
VIVO
V
IO = 10 mA
0.015
0.2
0.015
0.2
IO = 100 mA
0.16
0.6
0.16
0.6
OverVoltage Shutdown Threshold
Vth(OV)
26
29.5
40
26
29.5
40
V
Output Voltage with Reverse Polarity Input (Vin = 15 V)
VO
0.3
0
0.3
0
V
Output Inhibit Threshold Voltages
Vth(OI)
V
Output "On":
TJ = 25
C
2.15
1.90
2.15
1.90
TJ = 40
to +125
C
1.20
1.20
Output "Off":
TJ = 25
C
2.50
2.26
2.50
2.26
TJ = 40
to +125
C
3.25
3.25
Output Inhibit Threshold Current (Vth(OI) = 2.5 V)
Ith(OI)
30
50
30
50
A
NOTES: 1. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
2. The reference voltage on the adjustable device is measured from the output to the adjust pin across R1.
LM2931 Series
5
MOTOROLA ANALOG IC DEVICE DATA
IO = 100 mA
IO = 10 mA
, OUTPUT
VOL
T
AGE
(V)
O
V
V
in
O
, DROPOUT
VOL
T
AGE (mV)
V
Vin, INPUT VOLTAGE (V)
20
10
0
10
20
30
40
50
60
0
1.0
2.0
3.0
4.0
5.0
6.0
Vout = 5.0 V
RL = 500
TA = 25
C
, OUTPUT
CURRENT
(mA)
O
Vin, INPUT VOLTAGE (V)
50
150
250
350
0
5.0
10
15
20
25
30
I
TJ = 40
C
TJ = 25
C
TJ = 85
C
V
in
(10 V/DIV)
V
O
(5.0 V/DIV)
0
0
t, TIME (50 ms/DIV)
, INPUT
VOL
T
AGE
, OUTPUT
VOL
T
AGE
, OUTPUT
VOL
T
AGE
(V)
O
Vin, INPUT VOLTAGE (V)
0
1.0
2.0
3.0
4.0
5.0
6.0
0
1.0
2.0
3.0
4.0
5.0
6.0
V
TJ, JUNCTION TEMPERATURE (
C)
0
100
200
300
0
25
50
75
100
125
IO = 50 mA
V
in
O
IO, OUTPUT CURRENT (mA)
0
20
40
60
80
100
0
40
80
120
160
200
Vin = 14 V
Vout = 100 mV
TJ = 25
C
, DROPOUT
VOL
T
AGE (mV)
V
Vout = 5.0 V
RL = 50
CO = 100
F
= 150 ms
TA = 25
C
VCC = 15 V
VFB1 = 5.05 V
Dashed lines below Vin = 5.0 V
are for Adjustable output devices only.
Figure 1. Dropout Voltage versus Output Current
Figure 2. Dropout Voltage versus
Junction Temperature
Figure 3. Peak Output Current versus Input Voltage
Figure 4. Output Voltage versus Input Voltage
Figure 5. Output Voltage versus Input Voltage
Figure 6. Load Dump Characteristics
Vin = 14 V
Vout = 100 mV
Vout = 5.0 V
TA = 25
C
RL = 50
IO = 100 mA
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