Datasheet
LT1976/LT1976B
2
1976bfg
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
(Note 1)
V
IN
, SHDN, PG, BIAS .............................................. 60V
BOOST Pin Above SW ............................................ 35V
BOOST Pin Voltage ................................................. 68V
SYNC, C
SS
, PGFB, FB................................................ 6V
Operating JunctionTemperature Range
LT1976EFE/LT1976BEFE (Note 2) ... – 40°C to 125°C
LT1976IFE/LT1976BIFE (Note 2) ..... –40°C to 125°C
LT1976HFE (Note 2) ........................ –40°C to 140°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ORDER PART
NUMBER
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LT1976EFE
LT1976IFE
LT1976HFE
LT1976BEFE
LT1976BIFE
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full –40°C to 125°C
operating temperature range, otherwise specifications are at T
J
= 25°C. V
IN
= 12V, SHDN = 12V, BOOST = 15.3V, BIAS = 5V,
FB/PGFB = 1.25V, C
SS
/SYNC = 0V unless otherwise noted.
θ
JA
= 45°C/W, θ
JC(PAD)
= 10°C/W
EXPOSED PAD IS GND (PIN 17)
MUST BE SOLDERED TO GND (PIN 8)
FE PACKAGE
16-LEAD PLASTIC TSSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
NC
SW
NC
V
IN
NC
BOOST
C
T
GND
PG
SHDN
SYNC
PGFB
FB
V
C
BIAS
C
SS
17
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
SHDN
SHDN Threshold ● 1.2 1.3 1.4 V
I
SHDN
SHDN Input Current SHDN = 12V ● 520 μA
Minimum Input Voltage (Note 3) ● 2.4 3 V
I
VINS
Supply Shutdown Current SHDN = 0V, BOOST = 0V, FB/PGFB = 0V 0.1 2 μA
Supply Sleep Current (Note 4) (LT1976) BIAS = 0V, FB = 1.35V ● 170 230 μA
FB = 1.35V
● 45 75 μA
I
VIN
Supply Quiescent Current BIAS = 0V, FB = 1.15V, V
C
= 0.8V (V
C
= 0V LT1976B) 3.2 4.10 mA
BIAS = 5V, FB = 1.15V, V
C
= 0.8V (V
C
= 0V LT1976B) 2.6 3.25 mA
Minimum BIAS Voltage (Note 5) ● 2.7 3 V
I
BIASS
BIAS Sleep Current (Note 4) (LT1976) ● 110 180 μA
I
BIAS
BIAS Quiescent Current SYNC = 3.3V 700 800 μA
Minimum Boost Voltage (Note 6) I
SW
= 1.5A 1.8 2.5 V
Input Boost Current (Note 7) I
SW
= 1.5A 40 50 mA
V
REF
Reference Voltage (V
REF
) 3.3V < V
VIN
< 60V ● 1.225 1.25 1.275 V
I
FB
FB Input Bias Current 75 200 nA
EA Voltage Gain (Note 8) 900 V/V
EA Voltage g
m
dI(V
C
)= ±10μA 400 650 800 μMho
EA Source Current FB = 1.15V 20 40 55 μA
EA Sink Current FB = 1.35V 15 30 40 μA
V
C
to SW g
m
3A/V
V
C
High Clamp 2.1 2.2 2.4 V
V
C
Switching Threshold (LT1976B) ● 0.1 0.4 0.8 V
FE PART MARKING
1976EFE
1976IFE
1976HFE
1976BEFE
1976BIFE