LM138QML datasheet(5/34 Pages) TI1

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LM138QML

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SNVSAA9 – OCTOBER 2017

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(1)

For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

6.3 Thermal Information

THERMAL METRIC(1)

LM138QML

UNIT

K (TO-3)

2 PINS

RθJA

Junction-to-ambient thermal resistance

42.8

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

3.3

°C/W

ψJT

Junction-to-top characterization parameter

2.5

°C/W

ψJB

Junction-to-board characterization parameter

37.4

°C/W

(1)

These specifications are applicable for power dissipations up to 50W. Power dissipation is specified at these values up to 15-V input-

output differential. Above 15-V differential, power dissipation will be limited by internal protection circuitry. All limits (that is, the numbers

in the minimum and maximum columns) are specified to TI's AOQL (Average Outgoing Quality Level).

(2)

Typical figures are at TA = 25°C, and represent most likely parametric norms. Test limits are ensured to Texas Instruments' average

outgoing quality level (AOQL).

(3)

VIN – VOUT = 3.3 V at –55°C and 125°C.

(4)

Regulation is measured at a constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to

heating effects are covered under the specifications for thermal regulation.

(5)

Datalog reading in mV, 0.01% = 1.19 mV.

(6)

Family board not required for this device.

6.4 Electrical Characteristics

Values apply for VIN – VOUT = 5 V; and IOUT = 10 mA (unless otherwise noted)

(1)

PARAMETER

TEST CONDITIONS

SUB-

GROUPS

MIN

TYP(2)

MAX

UNIT

VREF

Reference voltage

VIN – VOUT = 3 V

(3)

[1, 2, 3]

1.19

1.29

VIN – VOUT = 3 V, IOUT = 5 A

[1, 2, 3]

1.19

1.29

VIN – VOUT = 5 V, IOUT = 7 A

[1, 2, 3]

1.19

1.29

VIN – VOUT = 35 V

[1, 2, 3]

1.19

1.29

VIN – VOUT = 35 V, IOUT = 150 mA

[1, 2, 3]

1.19

1.29

VRLINE

Line regulation(4)

3 V

≤ (VIN – VOUT) ≤ 35 V

[1]

–3.5

3.5

3.3 V

≤ (VIN – VOUT) ≤ 35 V

[2, 3]

–14

VRLOAD

Load regulation(4)

VIN – VOUT = 3 V, 10 mA ≤ IOUT ≤ 5 A,

VOUT = VREF

[1]

–3.8

3.8

VIN – VOUT = 3.3 V, 10 mA ≤ IOUT ≤ 5 A,

VOUT = VREF

[2, 3]

–8

VIN – VOUT = 35 V, 10 mA ≤ IOUT ≤ 150

mA, VOUT = VREF

[1]

–3.8

3.8

[2, 3]

–8

VRTH

Thermal regulation

VIN – VOUT = 10 V, pulse = 20 ms,

IOUT = 1 A

(5)

[1]

0.002

0.01

%/W

IADJ

Adjustment pin current

VIN – VOUT = 3 V

(3)

[1, 2, 3]

100

μA

VIN – VOUT = 35 V

[1, 2, 3]

100

ΔIADJ

Adjustment pin current change

3 V

≤ (VIN – VOUT) ≤ 35 V

(3)

[1, 2, 3]

–5

0.2

μA

10 mA

≤ IOUT ≤ 5 A

[1, 2, 3]

–5

ILOAD(MIN) Minimum load current

VIN – VOUT = 3 V, VOUT = 1.4 V

(3)

[1, 2, 3]

0.5

VIN – VOUT = 35 V, VOUT = 1.4 V

[1, 2, 3]

0.5

3.5

ICL

Current limit

VIN – VOUT = 10 V, T = 0.5 ms,

VOUT = 0 V

[1, 2, 3]

T = 5 ms, VOUT = 0 V

[1, 2, 3]

ΔVR/ΔVIN Ripple rejection ratio

VOUT = VREF, eIN = 1 VRMS, f = 120 Hz,

IOUT = 500 mA

(6)

[4]

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