Datasheet EZ1087CT Datasheet (Semtech Corporation)

5.0 AMP REMOTE SENSE
VOLTAGE REGULATOR

EZ1087

April 7, 1998

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DESCRIPTION

The EZ1087 5.0A voltage regulator is a monolithic
integrated circuit designed for use in applications
requiring a well regulated positive output voltage with
low input-output differential voltage requirements and
where remote sensing of the output voltage is desired
to compensate for connector, wiring and pc board
trace resistances or other voltage losses. Other
outstanding features include full power usage up to

5.0A of load current, internal current limiting, and
thermal shutdown. Specifications guarantee 3.30 VDC
output from a 4.75 VDC input.

APPLICATIONS

•= GTL+ bus supplies

BLOCK DIAGRAM

FEATURES

•= Low dropout performance, 1.3V max.

•= Kelvin remote sense inputs

•= Line regulation typically 0.015%

•= Load regulation typically 0.1%

•= 5-pin TO-220 package

ORDERING INFORMATION

DEVICE PACKAGE V

EZ1087CT TO-220 1.30 to 5.7

VOLTS

OUT

ABSOLUTE MAXIMUM RATINGS

Parameter Symbol Maximum Units

Input Voltage V
Sense Pins

Differential Voltage

V

+S

IN

- V

-S

7V
4V

PIN CONFIGURATION

EZ1087

PIN FUNCTION

1 - SENSE
2ADJ
3OUTPUT
4 INPUT
5 + SENSE

TAB IS OUTPUT

Sense Pin Voltage
Range

Power Dissipation

Thermal Resistance
Junction to Case

Thermal Resistance
Junction to Ambient

Operating Junction
Temperature Range

Storage Temperature
Range

Lead Temperature
(Soldering) 10 Sec

Note:
(1) (V

- 1V) ≤ V

OUT

±SENSE

T

T

≤ (V

V

P

θ

θ

T

STG

LEAD

SP

JC

JA

OUT

D

J

+ 0.4V)

Note 1 V

Internally

Limited

W

2.5 °C/W

50 °C/W

0 to 125 °C

-65 to 150 °C

260 °C

1

© 1998 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320

5.0 AMP REMOTE SENSE
VOLTAGE REGULATOR

April 7, 1998

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, VIN = 2.75V to 7.0V and Adj IO = 10mA to 5.0A

Test Conditions Test Limits

Parameter Symbol V

Reference Voltage

(1)

V

REF

IN

5V 10mA 25°C 1.238 1.250 1.262 V

I

O

Adj Voltage Version O.T. 1.225 1.250 1.275
Line Regulation

Load Regulation

(1)

(1)

REG

REG

(LINE)

(LOAD)

10mA 25°C 0.015 0.2 %

5V 25°C 0.1 0.3 %

(4)

T

J

Min Typ Max Units

O.T. 0.035 0.2

O.T. 0.2 0.4

EZ1087

Dropout Voltage V

= 1%

∆V

REF

Current Limit I
Temperature Coefficient T
Adjust Pin Current I

Adjust Pin Current
Change

∆I

Temperature Stability T
Minimum Load Current I
RMS Output Noise
Ripple Rejection Ratio
Common Mode

Range of Sense Pins

(2)

(3)

(5)

V

Differential Gain of
Sense Pins

Sense Bias Current I

V
R

CL

ADJ

ADJ

O

CM

D

25°C 1 V

O.T. 1.1 1.3
O.T. 5.0 7.5 A

C

O.T. 0.005 %/°C

25°C 55 µA

O.T. 90
O.T. 0.2 5 µA

S

5V 0.5A O.T. 0.5 %
5V O.T. 5 10 mA

N

A

5V 5.0A O.T. 60 72 dB

25°C 0.003 %V

O

25°C 0.4 mV

25°C 11 V / V

B

25°C 0.3 µA

NOTES:

(1) Low duty cycle pulse testing with Kelvin connections required.
(2)

Bandwidth of 10 Hz to 10 kHz.

(3) 120 Hz input ripple (C

for ADJ = 25µF).

ADJ

(4) Over Temp. (O.T.) = over specified operating junction temperature range.
(5) (V

- 1V) ≤ V

OUT

±SENSE

≤ V

OUT.

2

© 1998 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320

April 7, 1998

TYPICAL APPLICATIONS

5.0 AMP REMOTE SENSE
VOLTAGE REGULATOR

EZ1087

ADJUSTABLE VOLTAGE REGULATOR

(1)(2)

PARALLELING EZ1087 FOR HIGHER CURRENT

For paralleling more than two devices, duplicate slave section.
Minimum load current = (10mA) (# of devices in parallel).

1, R2 network can be used as a minimum load.

R

= 8m ohm 10” of #20 A.W.G. solid wire (copper).

R

M

= 7.3m ohm. 9.1” of #20 A.W.G. solid wire (copper).

R

S

and RS should be non-inductive. This is easily accomplished by

R

M

folding the wire back upon itself so that the fields generated by cur­rent flowing in the wire cancel.

3

© 1998 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320

April 7, 1998

DEVICE OUTLINE - 5 PIN TO-220

5.0 AMP REMOTE SENSE
VOLTAGE REGULATOR

EZ1087

4

© 1998 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320