LT1506 Linear Technology, LT1506 Datasheet - Page 2

• Manufacturer Part Number: LT1506
• Description: 4.5A/ 500kHz Step-Down Switching Regulator
• Manufacturer: Linear Technology

PACKAGE/ORDER
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
ELECTRICAL CHARACTERISTICS
ABSOLUTE
*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.
PARAMETER
Feedback Voltage (Adjustable)
Sense Voltage (Fixed 3.3V)
SENSE Pin Resistance
Reference Voltage Line Regulation
Feedback Input Bias Current
Error Amplifier Voltage Gain
Error Amplifier Transconductance
V
Error Amplifier Source Current
Error Amplifier Sink Current
V
V
Switch Current Limit
Slope Compensation
T
2
C
C
C
J
GND
T
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
TAB
JMAX
Pin to Switch Current Transconductance
Pin Switching Threshold
Pin High Clamp
= 25 C, V
IS
7-LEAD PLASTIC DD PAK
= 125 C,
FRONT VIEW
R PACKAGE
IN
JA
= 5V, V
= 30 C/W
7
6
5
4
3
2
1
W
MAXIMUM
JA
C
CAN VARY FROM 20 C/W
= 1.5V, Boost = V
FB OR SENSE*
BOOST
V
GND
V
SYNC OR SHDN*
V
IN
SW
C
W W
INFORMATION
U
CONDITIONS
All Conditions
All Conditions
4.3V V
(Notes 2, 8)
V
V
Duty Cycle = 0
V
DC = 80%
IN
FB
FB
C
I (V
RATINGS
+ 5V, switch open, unless otherwise noted.
Open, V
= 2.1V or V
= 2.7V or V
LT1506CR
LT1506CR-3.3
LT1506CR-SYNC
LT1506CR-3.3 SYNC
LT1506IR
LT1506IR-3.3
LT1506IR-SYNC
LT1506IR-3.3 SYNC
C
) = 10 A (Note 8)
W
IN
ORDER PART
FB
U
NUMBER
15V
= 2.1V or V
SENSE
SENSE
= 2.9V
= 3.7V
U
(Note 1)
SENSE
= 2.9V, DC 50%
SYNC Pin Voltage ..................................................... 7V
Operating Junction Temperature Range
Storage Temperature Range ................ – 65 C to 150 C
Lead Temperature (Soldering, 10 sec)................. 300 C
LT1506C ............................................... 0 C to 125 C
LT1506I ........................................... – 40 C to 125 C
SENSE*
BOOST
GND**
FB OR
**WITH FUSED (GND) GROUND PIN
JA
CONNECTED TO GROUND PLANE OR
LARGE LANDS
V
= 80 C/ W
IN
1
2
3
4
8-LEAD PLASTIC SO
S8 PACKAGE
TOP VIEW
8
7
6
5
V
SYNC
SHDN
V
SW
C
1500
1000
2.39
2.36
3.25
3.23
MIN
200
140
140
4.5
4
S8 PART MARKING
1506
150633
2000
2.42
0.01
TYP
400
225
225
3.3
6.6
0.5
5.3
0.9
2.1
0.8
LT1506CS8
LT1506CS8-3.3
LT1506IS8
LT1506IS8-3.3
6
ORDER PART
NUMBER
MAX
2700
3100
2.45
2.48
3.35
3.37
0.03
320
320
9.5
8.5
2
1506I
506I33
UNITS
%/ V
Mho
Mho
A/ V
k
V
V
V
V
A
A
A
V
V
A
A