Motorola LM2931T, LM2931D2T, LM2931D, LM2931AZ, LM2931CD Datasheet

Order this document by LM2931/D

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LOW DROPOUT

VOLTAGE REGULATORS

Z SUFFIX

PLASTIC PACKAGE

CASE 29

T SUFFIX

PLASTIC PACKAGE

CASE 221A

Heatsink surface

connected to Pin 2.

DT–1 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

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 

The LM2931 series consists of positive fixed and adjustable output
voltage regulators that are specifically designed to maintain proper
regulation with an extremely low input–to–output 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 power–up with mirror–image 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 microprocessor–based systems.

• Input–to–Output 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 Mirror–Image Protection

• Ideally Suited for Battery Powered Equipment

• Economical 5–Lead TO–220 Package with Two Optional Leadforms

• Available in Surface Mount SOP–8, D

2

PAK and DPAK Packages

• High Accuracy (±2%) Reference (LM2931AC) Available

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SOP–8)

1

8

ADJUSTABLE

FIXED

(Top View)

N.C.
Gnd

Input

N.C.
Gnd
Output18

54

(Top View)

Output

Inhibit

Gnd

Input

Adjust
Gnd
Output18

54

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

Output

Device

Voltage Tolerance

Case Package

LM2931AD–5.0

751 SOP–8 Surface Mount

LM2931ADT–5.0

369A Surface Mount DPAK

LM2931ADT–1–5.0

369 DPAK

LM2931AD2T–5.0

±3.8%

936 Surface Mount D2PAK

LM2931A T–5.0

221A TO–220 Type

LM2931AZ–5.0

29 TO–92 Type

LM2931D–5.0

5.0 V

751 SOP–8 Surface Mount

LM2931D2T–5.0

936 Surface Mount D2PAK

LM2931DT–5.0

369A Surface Mount DPAK

LM2931DT–1–5.0

369 DPAK

LM2931T–5.0

221A TO–220 Type

LM2931Z–5.0

±5.0%

29 TO–92 Type

LM2931CD

751 SOP–8 Surface Mount

LM2931CD2T

936A Surface Mount D2PAK

LM2931CT

Adjustable

314D 5–Pin TO–220 Type

LM2931CTH

j

314A 5–Pin Horizontal Leadform
LM2931CTV 314B 5–Pin Vertical Leadform
LM2931ACD

751 SOP–8 Surface Mount

LM2931ACD2T

936A Surface Mount D2PAK
LM2931ACT

Adjustable ±2.0%

314D 5–Pin TO–220 Type
LM2931ACTH 314A 5–Pin Horizontal Leadform
LM2931ACTV 314B 5–Pin 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 V

I

40 Vdc
Transient Input V oltage (τ ≤100 ms) VI(τ) 60 Vpk
Transient Reverse Polarity Input V oltage –VI(τ) –50– Vpk

1.0% Duty Cycle, τ ≤ 100 ms

Power Dissipation
Case 29 (TO–92 Type)

TA = 25°C P

D

Internally Limited W

Thermal Resistance, Junction–to–Ambient R

θJA

178 °C/W

Thermal Resistance, Junction–to–Case R

θJC

83 °C/W

Case 221A, 314A, 314B and 314D (TO–220 Type)

TA = 25°C P

D

Internally Limited W

Thermal Resistance, Junction–to–Ambient R

θJA

65 °C/W

Thermal Resistance, Junction–to–Case R

θJC

5.0 °C/W

Case 369 and 369A (DPAK) [Note 1]

TA = 25°C P

D

Internally Limited W

Thermal Resistance, Junction–to–Ambient R

θJA

92 °C/W

Thermal Resistance, Junction–to–Case R

θJC

6.0 °C/W

Case 751 (SOP–8) [Note 2]

TA = 25°C P

D

Internally Limited W

Thermal Resistance, Junction–to–Ambient R

θJA

160 °C/W

Thermal Resistance, Junction–to–Case R

θJC

25 °C/W

Case 936 and 936A (D2PAK) [Note 3]

TA = 25°C P

D

Internally Limited W

Thermal Resistance, Junction–to–Ambient R

θJA

70 °C/W

Thermal Resistance, Junction–to–Case R

θJC

5.0 °C/W

Tested Operating Junction Temperature Range T

J

–40 to +125 °C

Storage Temperature Range T

stg

–65 to +150 °C

NOTES: 1. DPAK Junction–to–Ambient Thermal Resistance is for vertical mounting. Refer to Figure 24 for

board mounted Thermal Resistance.

2.SOP–8 Junction–to–Ambient Thermal Resistance is for minimum recommended pad size. Refer
to Figure 23 for Thermal Resistance variation versus pad size.

3.D2PAK Junction–to–Ambient Thermal Resistance is for vertical mounting. Refer to Figure 25 for
board mounted Thermal Resistance.

4.ESD data available upon request.

ELECTRICAL CHARACTERISTICS (V

in

= 14 V, IO = 10 mA, CO = 100 µF, C

O(ESR)

= 0.3 Ω, TJ = 25°C [Note 1].)

LM2931–5.0 LM2931A–5.0

Characteristic Symbol

Min Typ Max Min Typ Max

Unit

FIXED OUTPUT

Output Voltage V

O

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 Reg

line

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) Reg

load

– 14 50 – 14 50 mV

Output Impedance Z

O

mΩ
IO = 10 mA, ∆IO = 1.0 mA, f = 100 Hz to 10 kHz – 200 – – 200 –

Bias Current I

B

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) V

n

– 700 – – 700 – µVrms

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 µF, C

O(ESR)

= 0.3 Ω, TJ = 25°C [Note 1].)

LM2931–5.0 LM2931A–5.0

Characteristic Symbol

Min Typ Max Min Typ Max

Unit

FIXED OUTPUT

Ripple Rejection (f = 120 Hz) RR 60 90 – 60 90 – dB
Dropout Voltage VI–V

O

V
IO = 10 mA – 0.015 0.2 – 0.015 0.2
IO = 100 mA – 0.16 0.6 – 0.16 0.6

Over–Voltage Shutdown Threshold V

th(OV)

26 29.5 40 26 29.5 40 V

Output Voltage with Reverse Polarity Input (Vin = –15 V) –V

O

–0.3 0 – –0.3 0 – V

ELECTRICAL CHARACTERISTICS (V

in

= 14 V, IO = 10 mA, CO = 100 µF, C

O(ESR)

= 0.3 Ω, TJ = 25°C [Note 1].)

LM2931C LM2931AC

Characteristic Symbol Min Typ Max Min Typ Typ Unit

ADJUSTABLE OUTPUT

Reference Voltage (Note 2, Figure 18) V

ref

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 to242.7 to

29.5

– 3.0 to242.7 to

29.5

– V

Line Regulation (Vin = VO + 0.6 V to 26 V) Reg

line

– 0.2 1.5 – 0.2 1.5 mV/V

Load Regulation (IO = 5.0 mA to 100 mA) Reg

load

– 0.3 1.0 – 0.3 1.0 %/V

Output Impedance Z

O

mΩ/V

IO = 10 mA, ∆IO = 1.0 mA, f = 10 Hz to 10 kHz – 40 – – 40 –

Bias Current I

B

mA
IO = 100 mA – 6.0 – – 6.0 –
IO = 10 mA – 0.4 1.0 – 0.4 1.0

Output Inhibited (V

th(OI)

= 2.5 V) – 0.2 1.0 – 0.2 1.0

Adjustment Pin Current I

Adj

– 0.2 – – 0.2 – µA

Output Noise Voltage (f = 10 Hz to 100 kHz) V

n

– 140 – – 140 – µVrms/V
Long–Term Stability S – 0.4 – – 0.4 – %/kHR
Ripple Rejection (f = 120 Hz) RR 0.10 0.003 – 0.10 0.003 – %/V
Dropout Voltage VI–V

O

V
IO = 10 mA – 0.015 0.2 – 0.015 0.2
IO = 100 mA – 0.16 0.6 – 0.16 0.6

Over–Voltage Shutdown Threshold V

th(OV)

26 29.5 40 26 29.5 40 V

Output Voltage with Reverse Polarity Input (Vin = –15 V) –V

O

–0.3 0 – –0.3 0 – V

Output Inhibit Threshold Voltages V

th(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 (V

th(OI)

= 2.5 V) I

th(OI)

– 30 50 – 30 50 µA

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 TAGE (V)

O

V

–V

in O

, DROPOUT VOLTAGE (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

V

out

= 5.0 V

RL = 500

Ω

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 VOLTAGE, OUTPUT VOL TAGE

, OUTPUT VOL TAGE (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

∆

V

out

= 100 mV

TJ = 25

°

C

, DROPOUT VOLTAGE (mV)V

V

out

= 5.0 V

RL = 50

Ω

CO = 100 µF

τ

= 150 ms

TA = 25

°

C

VCC = 15 V
V

FB1

= 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

∆

V

out

= 100 mV

V

out

= 5.0 V

TA = 25

°

C

RL = 50

Ω

IO = 100 mA

LM2931 Series

6

MOTOROLA ANALOG IC DEVICE DATA

I

B

, BIAS CURRENT (mA)

I

B

, BIAS CURRENT (mA)

I

B

Vin, INPUT VOLTAGE (V)

0

2.0

4.0

6.0

8.0

10

12

–20 –10 0 10 20 30 40 50 60

RL = 50

Ω

, BIAS CURRENT (mA)

TJ, JUNCTION TEMPERATURE (°C)

–55 –25 0 25 50 75 100 125

0

2.0

4.0

6.0

8.0

IO = 100 mA

RR, RIPPLE REJECTION RATIO (dB)

f, FREQUENCY (Hz)

55

65

75

85

95

10 100 1.0 k 1.0 M 10 M

C

O(ESR)

= 0.15

Ω

Tantulum

RR, RIPPLE REJECTION RATIO (dB)

85

95

0 20 40 60 80 100

IO, OUTPUT CURRENT (mA)

Ω

f, FREQUENCY (Hz)

, OUTPUT IMPEDANCE ( )

O

0

0.4

0.8

1.2

1.6

2.0

10 100 1.0 k 10 k 100 k 1.0 M 10 M

I

C

O(ESR)

= 0.3

Ω

Electrolytic

C

O(ESR)

= 0.15

Ω

Tantulum

0

2.0

4.0

6.0

8.0

0 20 40 60 80 100

IO, OUTPUT CURRENT (mA)

IO = 0 mA

IO = 50 mA

V

out

= 5.0 V

TJ = 25

°

C

Vin = 14 V
V

out

= 5.0 V
IO = 10 mA
DIO = 1.0 mA
CO = 100

µ

F

TJ = 25

°

C

Vin = 14 V

V

out

= 5.0 V

65

75

Vin = 14 V
V

out

= 5.0 V
f = 120 Hz
TJ = 25

°

C

Vin = 14 V
V

out

= 5.0 V
DVin = 100 mV
RL = 500

Ω

CO = 100 µF
TJ = 25

°

C

C

O(ESR)

= 0.3

Ω

Electrolytic

10 k 100 k

Figure 7. Bias Current versus Input Voltage

Figure 8. Bias Current versus Output Current

Figure 9. Bias Current versus Junction Temperature Figure 10. Output Impedance versus Frequency

Figure 11. Ripple Rejection versus Frequency Figure 12. Ripple Rejection versus Output Current

RL = 100

Ω

RL = 500

Ω

Vin = 14 V
V

out

= 5.0 V

TJ = 25

°

C

LM2931 Series

7

MOTOROLA ANALOG IC DEVICE DATA

, REFERENCE VOLTAGE (V)

ref

VO, OUTPUT VOLTAGE (V)

1.160

1.180

1.200

1.220

1.240

0 3.0 6.0 9.0 12 15 18 21 24

V

18.5

14

t, TIME (10

µ

s/DIV)

V

out

= 5.0 V

RL = 500

Ω

CO = 100 µF
C

O(ESR)

= 0.3

Ω

TA = 25°C

100

0

t, TIME (10

µ

s/DIV)

VO, OUTPUT VOLTAGE (V)

V

th(on/off)

, OUTPUT INHIBIT-THRESHOLDS (V)

2.0

2.1

2.2

0 3.0 6.0 9.0 12 15 18 21 24

Output “On”

Output “Off”

2.4

2.5

2.6

2.3

LM2931C Adjustable
IO = 10 mA
Vin = V

out

+ 1.0 V

TA = 25

°

C

Vin = 14 V
V

out

= 5.0 V

Cin = 1000

µ

F

CO = 100 µF
C

O(ESR)

= 0.3

Ω

TA = 25°C

LM2931C Adjustable
IO = 10 mA
Vin = V

out

+ 1.0 V

TA = 25

°

C

OUTPUT CURRENT,

I (mA)

out

∆

OUTPUT VOLTAGE DEVIATION,

O

, (2.0 mV/DIV)V

INPUT VOLTAGE,

V , (V)

in

∆

OUTPUT VOLTAGE DEVIATION,

O

, (2.0 mV/DIV)V

Figure 13. Line Regulation

Figure 14. Load Regulation

Figure 15. Reference Voltage versus Output Voltage

Figure 16. Output Inhibit–Thresholds

versus Output Voltage

APPLICATIONS INFORMATION

The LM2931 series regulators are designed with many
protection features making them essentially blow–out proof.
These features include internal current limiting, thermal
shutdown, overvoltage and reverse polarity input protection,
and the capability to withstand temporary power–up with
mirror–image insertion. Typical application circuits for the
fixed and adjustable output device are shown in Figures 17
and 18.

The input bypass capacitor Cin is recommended if the
regulator is located an appreciable distance (≥ 4″) from the
supply input filter. This will reduce the circuit’s sensitivity to
the input line impedance at high frequencies.

This regulator series is not internally compensated and
thus requires an external output capacitor for stability. The
capacitance value required is dependent upon the load
current, output voltage for the adjustable regulator, and the
type of capacitor selected. The least stable condition is
encountered at maximum load current and minimum output
voltage. Figure 22 shows that for operation in the “Stable”
region, under the conditions specified, the magnitude of the
output capacitor impedance |ZO| must not exceed 0.4 Ω. This
limit must be observed over the entire operating temperature
range of the regulator circuit.

With economical electrolytic capacitors, cold temperature
operation can pose a serious stability problem. As the
electrolyte freezes, around –30°C, the capacitance will
decrease and the equivalent series resistance (ESR) will
increase drastically, causing the circuit to oscillate. Quality
electrolytic capacitors with extended temperature ranges of
–40° to +85°C and –55° to +105°C are readily available.
Solid tantalum capacitors may be a better choice if small size
is a requirement, however, the maximum ZO limit over
temperature must be observed.

Note that in the stable region, the output noise voltage is
linearly proportional to ZO. In effect, CO dictates the high
frequency roll–off point of the circuit. Operation in the area
titled “Marginally Stable” will cause the output of the regulator
to exhibit random bursts of oscillation that decay in an
under–damped fashion. Continuous oscillation occurs when
operating in the area titled “Unstable”. It is suggested that
oven testing of the entire circuit be performed with maximum
load, minimum input voltage, and minimum ambient
temperature.

LM2931 Series

8

MOTOROLA ANALOG IC DEVICE DATA

0.1

1.0

0.01

V

n

, OUTPUT NOISE VOL TAGE (mVrms)

Figure 17. Fixed Output Regulator Figure 18. Adjustable Output Regulator

Figure 19. (5.0 A) Low Differential

Voltage Regulator

Figure 20. Current Boost Regulator with

Short Circuit Projection

Figure 21. Constant Intensity Lamp Flasher Figure 22. Output Noise Voltage versus

Output Capacitor Impedance

|ZO|, MAGNITUDE OF CAPACIT OR IMPEDANCE (mΩ)

10 100 1.0 k 10 k

V

in

Input

Output

V

out

C

O

I

B

Gnd

C

in

0.1

LM2931–5.0

Fixed

Output

Switch Position 1 = Output “On”, 2 = Output “Off”

LM2931C

Adjustable

Output

V

in

C

in

0.1

V

out

C

O

OutputInput

51 k

1

2

Output

Inhibit

Adjust

Gnd

I

Adj

R

1

R

2

I

B

The LM2931 series can be current boosted with a PNP transistor. The
D45VH7, on a heatsink, will provide an output current of 5.0 A with an input
to output voltage differential of approximately 1.0 V. Resistor R in
conjunction with the VBE of the PNP determines when the pass transistor
begins conducting. This circuit is not short circuit proof.

Input

≥

6.0 V

D45VH7

5.0 V @ 5.0 A
Output

100

+

100

+

68

LM2931–5.0

The circuit of Figure 19 can be modified to provide supply protection against
short circuits by adding the current sense resistor RSC and an additional PNP
transistor. The current sensing PNP must be capable of handling the short
circuit current of the LM2931. Safe operating area of both transistors must be
considered under worst case conditions.

Input

R

R

SC

Output

LM2931–5.0

100 100

++

LM2931C

Input

6.4 V to 30 V

2.0 k

8.2 k

100

+

CM

#345

100

+

33 k

6.2 V

f

osc

= 2.2 Hz

0

10

100

Vin = 5.6 V
V

out

= 5.0 V
IO = 100 mA
Vnrms 10 Hz to 10 MHz
|ZO| @ 40 kHz
TA = 25

°

C

22.5 k

w

R1R

2

R

1

)

R

2

V

out

+

V

ref

ǒ

1

)

R

2

R

1

Ǔ

)

I

Adj

R

2

R

Unstable

Marginally
Stable

Stable

LM2931 Series

9

MOTOROLA ANALOG IC DEVICE DATA

40

50

60

70

80

90

100

0

0.4

0.8

1.2

1.6

2.0

2.4

010203025155.0
L, LENGTH OF COPPER (mm)

P

D(max)

for TA = 50°C

Minimum
Size Pad

P

D

L

L

, MAXIMUM POWER DISSIPATION (W)

Free Air
Mounted
Vertically

30

40

50

60

70

80

1.0

1.5

2.0

2.5

3.0

3.5

010203025155.0
L, LENGTH OF COPPER (mm)

P

D(max)

for TA = 50°C

Minimum
Size Pad

2.0 oz. Copper
L

L

Free Air

Mounted

Vertically

P

D

, MAXIMUM POWER DISSIPATION (W)

30

50

70

90

110

130

150

0.4

0.8

1.2

1.6

2.0

2.4

2.8

02030504010

L, LENGTH OF COPPER (mm)

170 3.2

R

θ

JA

P

D

R , THERMAL RESISTANCE

JA

θ

JUNCTION–TO–AIR ( C/W)

°

, MAXIMUM POWER DISSIPATION (W)

2.0 oz.

Copper

Graph represents symmetrical layout

3.0 mmL

L

R

θ

JA

R

θ

JA

2.0 oz. Copper

R , THERMAL RESISTANCE

JA

θ

JUNCTION–TO–AIR ( C/W)

°

R , THERMAL RESISTANCE

JA

θ

JUNCTION–TO–AIR ( C/W)

°

Figure 23. SOP–8 Thermal Resistance and Maximum

Power Dissipation versus P.C.B. Copper Length

Figure 24. DPAK Thermal Resistance and Maximum

Power Dissipation versus P.C.B. Copper Length

Figure 25. 3–Pin and 5–Pin D2PAK

Thermal Resistance and Maximum Power

Dissipation versus P.C.B. Copper Length

P

D(max)

for TA = 50°C

LM2931 Series

10

MOTOROLA ANALOG IC DEVICE DATA

DEFINITIONS

Dropout Voltage – The input/output voltage dif ferential at

which the regulator output no longer maintains regulation
against further reductions in input voltage. Measured when
the output decreases 100 mV from nominal value at 14 V
input, dropout voltage is affected by junction temperature and
load current.

Line Regulation – The change in output voltage for a
change in the input voltage. The measurement is made under
conditions of low dissipation or by using pulse techniques
such that the average chip temperature is not significantly
affected.

Load Regulation – The change in output voltage for a
change in load current at constant chip temperature.

Maximum Power Dissipation – The maximum total
device dissipation for which the regulator will operate within
specifications.

Bias Current – That part of the input current that is not
delivered to the load.

Output Noise Voltage – The rms AC voltage at the
output, with constant load and no input ripple, measured over
a specified frequency range.

Long–Term Stabliity – Output voltage stability under
accelerated life test conditions with the maximum rated
voltage listed in the devices electrical characteristics and
maximum power dissipation.

LM2931 Series

11

MOTOROLA ANALOG IC DEVICE DATA

Z SUFFIX

PLASTIC PACKAGE

CASE 29–04

(TO–92 Type)

ISSUE AD

OUTLINE DIMENSIONS

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

3. CONTOUR OF PACKAGE BEYOND DIMENSION R
IS UNCONTROLLED.

4. DIMENSION F APPLIES BETWEEN P AND L.
DIMENSION D AND J APPLY BETWEEN L AND K
MINIMUM. LEAD DIMENSION IS UNCONTROLLED
IN P AND BEYOND DIMENSION K MINIMUM.

MIN MINMAX MAX

INCHES MILLIMETERS

DIM

A
B
C
D

F
G
H

J
K

L
N
P
R
V

4.45

4.32

3.18

0.41

0.41

1.15

2.42

0.39

12.70

6.35

2.04
–

2.93

3.43

5.20

5.33

4.19

0.55

0.48

1.39

2.66

0.50
–
–

2.66

2.54
–
–

0.175

0.170

0.125

0.016

0.016

0.045

0.095

0.015

0.500

0.250

0.080
–

0.115

0.135

0.205

0.210

0.165

0.022

0.019

0.055

0.105

0.020
–
–

0.105

0.100
–
–

SEATING

PLANE

R

A

P

F

L

K

XX

H

G

V

N

N

D

J

SECTION X–X

B

C

1

T SUFFIX

PLASTIC PACKAGE

CASE 221A–06

(TO–220 Type)

ISSUE Y

MIN MINMAX MAX

INCHES MILLIMETERS

DIM

A
B
C
D
F
G
H
J
K
L
N
Q
R
S
T
U
V
Z

14.48

9.66

4.07

0.64

3.61

2.42

2.80

0.46

12.70

1.15

4.83

2.54

2.04

1.15

5.97

0.00

1.15
–

15.75

10.28

4.82

0.88

3.73

2.66

3.93

0.64

14.27

1.52

5.33

3.04

2.79

1.39

6.47

1.27
–

2.04

0.570

0.380

0.160

0.025

0.142

0.095

0.110

0.018

0.500

0.045

0.190

0.100

0.080

0.045

0.235

0.000

0.045
–

0.620

0.405

0.190

0.035

0.147

0.105

0.155

0.025

0.562

0.060

0.210

0.120

0.110

0.055

0.255

0.050
–

0.080

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

3. DIM Z DEFINES A ZONE WHERE ALL BODY AND
LEAD IRREGULARITIES ARE ALLOWED.

–T–

SEATING
PLANE

C

S

T

U

J

R

F

B

Q

H

Z

L

V

G

N

D

K

A

4

123

LM2931 Series

12

MOTOROLA ANALOG IC DEVICE DATA

TH SUFFIX

PLASTIC PACKAGE

CASE 314A–03

(TO–220 Type)

ISSUE D

TV SUFFIX

PLASTIC PACKAGE

CASE 314B–05

(TO–220 Type)

ISSUE J

G

W

E

J 5 PL

D 5 PL

F

K

U

B

A

L

C

H

12345

SEATING
PLANE

–T–

N

S

V

T

0.24 (0.610)

M

–P–

Q

TP0.10 (0.254)

M M

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

3. DIMENSION D DOES NOT INCLUDE INTERCONNECT BAR
(DAMBAR) PROTRUSION. DIMENSION D INCLUDING
PROTRUSION SHALL NOT EXCEED 0.043 (1.092) MAXIMUM.

1.702 BSC0.067 BSC

MIN MINMAX MAX

INCHES MILLIMETERS

DIM

A
B
C
D
E
F
G
H
J
K
L
N
Q
S
U
V

W

14.529

9.906

4.318

0.635

1.219

21.590

0.381

22.860

8.128

3.556
–

11.888
–

2.286

15.570

10.541

4.572

0.965

1.397

23.749

0.635

27.940

9.271

3.886

15.748

12.827

18.669

2.794

0.572

0.390

0.170

0.025

0.048

0.850

0.015

0.900

0.320

0.140
–

0.468
–

0.090

0.613

0.415

0.180

0.038

0.055

0.935

0.025

1.100

0.365

0.153

0.620

0.505

0.735

0.110

4.216 BSC0.166 BSC

8.128 BSC0.320 BSC

OUTLINE DIMENSIONS

G

E

J 5 PL

D 5 PL

F

K

U

B

A

L

C

12345

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

3. DIMENSION D DOES NOT INCLUDE
INTERCONNECT BAR (DAMBAR) PROTRUSION.
DIMENSION D INCLUDING PROTRUSION SHALL
NOT EXCEED 0.043 (1.092) MAXIMUM.

SEATING
PLANE

–T–

S

TP0.014 (0.356)

M M

OPTIONAL
CHAMFER

Q

DIMAMIN MAX MIN MAX

MILLIMETERS

0.572 0.613 14.529 15.570

INCHES

B 0.390 0.415 9.906 10.541
C 0.170 0.180 4.318 4.572
D 0.025 0.038 0.635 0.965
E 0.048 0.055 1.219 1.397
F 0.570 0.585 14.478 14.859

G 0.067 BSC 1.702 BSC

J 0.015 0.025 0.381 0.635
K 0.730 0.745 18.542 18.923
L 0.320 0.365 8.128 9.271

Q 0.140 0.153 3.556 3.886

S 0.210 0.260 5.334 6.604
U 0.468 0.505 11.888 12.827

–P–

LM2931 Series

13

MOTOROLA ANALOG IC DEVICE DATA

DT–1 SUFFIX

PLASTIC PACKAGE

CASE 369–07

(DPAK)

ISSUE L

T SUFFIX

PLASTIC PACKAGE

CASE 314D–03

(TO–220 Type)

ISSUE D

–Q–

–T–

SEATING
PLANE

C

U

G

E

H

J

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

3. DIMENSION D DOES NOT INCLUDE
INTERCONNECT BAR (DAMBAR) PROTRUSION.
DIMENSION D INCLUDING PROTRUSION SHALL
NOT EXCEED 10.92 (0.043) MAXIMUM.

MIN MINMAX MAX

INCHES MILLIMETERS

DIM

A
B
C
D
E
G
H

J

K

L
Q
U
S

14.529

9.906

4.318

0.635

1.219

2.210

0.381

25.908

8.128

3.556

2.667

13.792

15.570

10.541

4.572

0.965

1.397

2.845

0.635

27.051

9.271

3.886

2.972

14.783

0.572

0.390

0.170

0.025

0.048

0.087

0.015

1.020

0.320

0.140

0.105

0.543

0.613

0.415

0.180

0.038

0.055

0.112

0.025

1.065

0.365

0.153

0.117

0.582

A

B

L

S

K

D

5 PL

1.702 BSC0.067 BSC

12345

0.356 (0.014) T Q

M M

OUTLINE DIMENSIONS

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

123

4

V

S

A

K

–T–

SEATING
PLANE

R

B

F

G

D

3 PL

M

0.13 (0.005) T

C

E

J

H

DIM MIN MAX MIN MAX

MILLIMETERSINCHES

A 0.235 0.250 5.97 6.35
B 0.250 0.265 6.35 6.73
C 0.086 0.094 2.19 2.38
D 0.027 0.035 0.69 0.88

E 0.033 0.040 0.84 1.01
F 0.037 0.047 0.94 1.19

G

0.090 BSC 2.29 BSC

H 0.034 0.040 0.87 1.01

J 0.018 0.023 0.46 0.58
K 0.350 0.380 8.89 9.65
R 0.175 0.215 4.45 5.46

S 0.050 0.090 1.27 2.28

V 0.030 0.050 0.77 1.27

LM2931 Series

14

MOTOROLA ANALOG IC DEVICE DATA

OUTLINE DIMENSIONS

DT SUFFIX

PLASTIC PACKAGE

CASE 369A–13

(DPAK)

ISSUE Y

D SUFFIX

PLASTIC PACKAGE

CASE 751–05

(SOP–8)
ISSUE S

D

A

K

B
R

V

S

F

L

G

2 PL

M

0.13 (0.005) T

E

C

U

J

H

–T–

SEATING
PLANE

Z

DIM MIN MAX MIN MAX

MILLIMETERSINCHES

A 0.235 0.250 5.97 6.35
B 0.250 0.265 6.35 6.73
C 0.086 0.094 2.19 2.38
D 0.027 0.035 0.69 0.88
E 0.033 0.040 0.84 1.01
F 0.037 0.047 0.94 1.19
G 0.180 BSC 4.58 BSC
H 0.034 0.040 0.87 1.01
J 0.018 0.023 0.46 0.58
K 0.102 0.114 2.60 2.89
L 0.090 BSC 2.29 BSC
R 0.175 0.215 4.45 5.46
S 0.020 0.050 0.51 1.27
U 0.020 ––– 0.51 –––
V 0.030 0.050 0.77 1.27
Z 0.138 ––– 3.51 –––

123

4

SEATING
PLANE

1

4

58

A0.25MCB

SS

0.25MB

M

h

q

C

X 45

_

L

DIM MIN MAX

MILLIMETERS

A 1.35 1.75

A1 0.10 0.25

B 0.35 0.49
C 0.18 0.25
D 4.80 5.00
E

1.27 BSCe

3.80 4.00

H 5.80 6.20

h

0 7

L 0.40 1.25

q

0.25 0.50

__

NOTES:

1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.

2. DIMENSIONS ARE IN MILLIMETERS.

3. DIMENSION D AND E DO NOT INCLUDE MOLD
PROTRUSION.

4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.

5. DIMENSION B DOES NOT INCLUDE MOLD
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.

D

E

H

A

B

e

B

A1

C

A

0.10

LM2931 Series

15

MOTOROLA ANALOG IC DEVICE DATA

D2T SUFFIX

PLASTIC PACKAGE

CASE 936–03

(D2PAK)
ISSUE B

5 REF5 REF

A

12 3

K

F

B

J

S

H

0.010 (0.254) T

M

D

G

C

E

–T–

M

L

P

N

R

V

U

TERMINAL 4

NOTES:

1 DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

2 CONTROLLING DIMENSION: INCH.
3 TAB CONTOUR OPTIONAL WITHIN DIMENSIONS

A AND K.

4 DIMENSIONS U AND V ESTABLISH A MINIMUM

MOUNTING SURFACE FOR TERMINAL 4.

5 DIMENSIONS A AND B DO NOT INCLUDE MOLD

FLASH OR GATE PROTRUSIONS. MOLD FLASH
AND GATE PROTRUSIONS NOT TO EXCEED

0.025 (0.635) MAXIMUM.

DIMAMIN MAX MIN MAX

MILLIMETERS

0.386 0.403 9.804 10.236

INCHES

B 0.356 0.368 9.042 9.347
C 0.170 0.180 4.318 4.572
D 0.026 0.036 0.660 0.914
E 0.045 0.055 1.143 1.397

F 0.051 REF 1.295 REF
G 0.100 BSC 2.540 BSC
H 0.539 0.579 13.691 14.707

J 0.125 MAX 3.175 MAX
K 0.050 REF 1.270 REF

L 0.000 0.010 0.000 0.254
M 0.088 0.102 2.235 2.591
N 0.018 0.026 0.457 0.660
P 0.058 0.078 1.473 1.981
R
S 0.116 REF 2.946 REF
U 0.200 MIN 5.080 MIN
V 0.250 MIN 6.350 MIN

__

OUTLINE DIMENSIONS

D2T SUFFIX

PLASTIC PACKAGE

CASE 936A–02

(D2PAK)
ISSUE A

5 REF

A

123

K

B

S

H

0.010 (0.254) T

M

D

G

C

E

–T–

M

L

P

N

R

V

U

TERMINAL 6

NOTES:

6 DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

7 CONTROLLING DIMENSION: INCH.
8 TAB CONTOUR OPTIONAL WITHIN DIMENSIONS

A AND K.

9 DIMENSIONS U AND V ESTABLISH A MINIMUM

MOUNTING SURFACE FOR TERMINAL 6.

10 DIMENSIONS A AND B DO NOT INCLUDE MOLD

FLASH OR GATE PROTRUSIONS. MOLD FLASH
AND GATE PROTRUSIONS NOT TO EXCEED

0.025 (0.635) MAXIMUM.

DIMAMIN MAX MIN MAX

MILLIMETERS

0.386 0.403 9.804 10.236

INCHES

B 0.356 0.368 9.042 9.347

C 0.170 0.180 4.318 4.572

D 0.026 0.036 0.660 0.914

E 0.045 0.055 1.143 1.397

G 0.067 BSC 1.702 BSC

H 0.539 0.579 13.691 14.707

K 0.050 REF 1.270 REF

L 0.000 0.010 0.000 0.254

M 0.088 0.102 2.235 2.591

N 0.018 0.026 0.457 0.660

P 0.058 0.078 1.473 1.981

R 5 REF

S 0.116 REF 2.946 REF

U 0.200 MIN 5.080 MIN

V 0.250 MIN 6.350 MIN

__

45

LM2931 Series

16

MOTOROLA ANALOG IC DEVICE DATA

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty , representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “T ypical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.

Mfax is a trademark of Motorola, Inc.

How to reach us:
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INTERNET: http://motorola.com/sps

LM2931/D

◊