NTE NTE1929 Datasheet

NTE1929

3 Terminal Adjustable Positive Voltage Regulator

1.2V to 33V, 3A

Description:

The NTE1929 is an adjustable 3–terminal positive voltage regulator in a TO220 type package capable
of supplying in excess of 3A over an output voltage range of 1.2V to 33V . This device employes inter­nal current limiting, thermal shutdown, and safe area compensation making the it essentially blow–out
proof.

The NTE1929 serves a wide variety of applications including local, on card regulation. This device
also makes an especially simple adjustable switching regulator, a programmable output regulator,
and can also be used as a precision current regulator.

Features:

D Guaranteed 3A Output Current
D Output Adjustable Between 1.2V and 33V
D Load Regulation Typically 0.1%
D Line Regulation Typically 0.005%/V
D Internal Thermal Overload Protection
D Internal Short–Circuit Current Limiting Constant with Temperature
D Floating Operation for High Voltage Applications
D Standard 3–Lead TO220 Type Transistor Package
D Eliminates Stocking many Fixed Voltages

Absolute Maximum Ratings:

Input–Output Voltage Differential, VI–V
Power Dissipation, P

D

Operating Junction Temperature Range, T
Storage Temperature Range, T

stg

O

J

Lead Temperature (During Soldering, 10sec), T
Thermal Resistance, Junction–to–Case, R

thJC

Internally Limited. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

L

35V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

+300°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Peak (Note 1) 2.3°C/W Max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Average (Note 2) 1.5°C/W Typ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Note 1. Thermal Resistance evaluated measuring the hottest temperature on the die using an in-

frared scanner. This method of evaluation yields very accurate thermal resistance values
which are conservativeompared to other measurement techniques.

Note 2. The average die temperature is used to derive the value of thermal resistance junction to

case (average).

Electrical Characteristics: (VI–VO = 5V, IL = 1.5A, TJ = 0° to +125°C, P

otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

= 25W unless

max

Line Regulation Reg

3V ≤ VI–VO ≤ 35V,

line

TA = +25°C – 0.005 0.03 %/V

Note 3

Load Regulation Reg

10mA ≤ IL ≤ 3A,

load

TA = +25°C – 5.0 25 mV

VO ≤5V, Note 3
10mA ≤ IL ≤ 3A,

TA = +25°C – 0.1 0.5 % V

VO ≥5V, Note 3

Thermal Regulation Reg
Adjustment Pin Current I
Adjustment Pin Current Change ∆I

Reference Voltage V

Temperature Stability T
Minimum Load Current to Maintain

I

thermTA

Adj

Adj

ref

S

Lmin

= +25°C, Pulse = 20ms – 0.002 – % VO/W

3V ≤ VI–VO ≤ 35V, 10mA ≤ IL ≤ 3A,
PD = P

max

3V ≤ VI–VO ≤ 35V, 10mA ≤ IL ≤ 3A,
PD = P

max

0° ≤ TJ ≤ +125°C – 1.0 – % V
VI–VO = 35V – 3.5 10 mA

Regulation

Maximum Output Current I

RMS Noise, % of V

O

max

N 10Hz ≤ f ≤ 10kHz, TA = +25°C – 0.003 – % V

Ripple Rejection RR

VI–VO ≤ 10V, PD ≤ P
VI–VO = 30V, PD ≤ P

VO = 10V, f = 120Hz,
Note 4

max

, TA = +2 5°C 0.25 1.0 – A

max

C

= 10µF 66 80 – dB

Adj

Long–Term Stability S TJ = +125°C, Note 5, TA = +2 5°C for

Endpoint Measurements

– 0.02 0.07 %/V

– 20 70 mV

– 0.3 1.5 % V

– 50 100 µA
– 0.2 5.0 µA

1.20 1.25 1.30 V

3.0 4.5 – A

– 65 – dB

– 0.3 1.0 %/1.0k

Hrs.

O
O

O

O

Note 3. Load and line regulation are specified at constant junction temperature. Changes in VO due

to heating effects must be taken into account separately. Pulse testing with low duty cycle
is used.

Note 4. C

, when used, is connected between the adjustment pin and GND.

Adj

Note 5. Since Long–Term Stability cannot be measured on each device before shipment, this speci-

fication is an engineering estimate of average stability from lot to lot.

.420 (10.67)

Max

.110 (2.79)

.147 (3.75)

Dia Max

.070 (1.78)

Max

Adjust

.100 (2.54)

Tab

.250

(6.35)

Max

V
V

.500

(12.7)

Max

.500

(12.7)

Min

IN
OUT

/TAB