2

LT1506

Input Voltage .......................................................... 16V

BOOST Pin Above Input Voltage ............................. 15V

SHDN Pin Voltage ..................................................... 7V

FB Pin Voltage (Adjustable Part) ............................ 3.5V

FB Pin Current (Adjustable Part) ............................ 1mA

Sense Voltage (Fixed 3.3V Part) ............................... 5V

SYNC Pin Voltage ..................................................... 7V

Operating Junction Temperature Range

LT1506C ............................................... 0

°C to 125° C

LT1506I ........................................... – 40

°C to 125°C

Storage Temperature Range ................ – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec) ................. 300

°C

ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Feedback Voltage (Adjustable)

2.39

2.42

2.45

V

All Conditions

q

2.36

2.48

V

Sense Voltage (Fixed 3.3V)

3.25

3.3

3.35

V

All Conditions

q

3.23

3.37

V

SENSE Pin Resistance

4

6.6

9.5

k

Ω

Reference Voltage Line Regulation

4.3V

0.01

0.03

%/ V

Feedback Input Bias Current

q

0.5

2

µA

Error Amplifier Voltage Gain

(Notes 2, 8)

200

400

Error Amplifier Transconductance

1500

2000

2700

µMho

q

1000

3100

µMho

5.3

A/ V

Error Amplifier Source Current

q

140

225

320

µA

Error Amplifier Sink Current

q

140

225

320

µA

Duty Cycle = 0

0.9

V

2.1

V

Switch Current Limit

q

4.5

6

8.5

A

Slope Compensation

DC = 80%

0.8

A

ORDER PART

NUMBER

ORDER PART

NUMBER

LT1506CR

LT1506CR-3.3

LT1506CR-SYNC

LT1506CR-3.3 SYNC

LT1506IR

LT1506IR-3.3

LT1506IR-SYNC

LT1506IR-3.3 SYNC

WITH PACKAGE SOLDERED TO 0.5 SQUARE INCH

COPPER AREA OVER BACKSIDE GROUND PLANE OR

INTERNAL POWER PLANE.

TO > 40

°C/W DEPENDING ON MOUNTING TECHNIQUES

1506I

506I33

1506

150633

S8 PART MARKING

LT1506CS8

LT1506CS8-3.3

LT1506IS8

LT1506IS8-3.3

*Default is the adjustable output voltage device with FB pin and shutdown function. Option -3.3 replaces FB with SENSE pin for fixed 3.3V output

applications. -SYNC replaces SHDN with SYNC pin for applications requiring synchronization. Consult factory for Military grade parts.

FB OR SENSE*

BOOST

GND

SYNC OR SHDN*

R PACKAGE

7-LEAD PLASTIC DD PAK

FRONT VIEW

TAB

IS

GND

7

6

5

4

3

2

1

1

2

3

4

8

7

6

5

TOP VIEW

S8 PACKAGE

8-LEAD PLASTIC SO

BOOST

GND**

SYNC

SHDN

FB OR

SENSE*

**WITH FUSED (GND) GROUND PIN

CONNECTED TO GROUND PLANE OR

LARGE LANDS

(Note 1)