Datasheet

2
LT1511
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
UU
ORDER PART
NUMBER
LT1511CSW
LT1511ISW
T
JMAX
= 125°C, θ
JA
= 30°C/W**
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
SW PACKAGE
24-LEAD PLASTIC SO WIDE
24
23
22
21
20
19
18
17
16
15
14
13
GND**
SW
BOOST
GND**
GND**
UV
GND**
OVP
CLP
CLN
COMP1
SENSE
GND**
GND**
V
CC1
*
V
CC2
*
V
CC3
*
PROG
V
C
UV
OUT
GND**
COMP2
BAT
SPIN
Consult factory for Military grade parts.
*ALL V
CC
PINS SHOULD
BE CONNECTED
TOGETHER CLOSE TO
THE PINS
**ALL GND PINS ARE
FUSED TO INTERNAL DIE
ATTACH PADDLE FOR
HEAT SINKING. CONNECT
THESE PINS TO
EXPANDED PC LANDS
FOR PROPER HEAT
SINKING. 30°C/W
THERMAL RESISTANCE
ASSUMES AN INTERNAL
GROUND PLANE
DOUBLING AS A HEAT
SPREADER
(Note 1)
Supply Voltage
(V
MAX
, CLP and CLN Pin Voltage) ...................... 30V
Switch Voltage with Respect to GND...................... –3V
Boost Pin Voltage with Respect to V
CC
................... 25V
Boost Pin Voltage with Respect to GND ................. 57V
Boost Pin Voltage with Respect to SW Pin .............. 30V
V
C
, PROG, OVP Pin Voltage...................................... 8V
I
BAT
(Average)........................................................... 3A
Switch Current (Peak) .............................................. 4A
Operating Junction Temperature Range
Commercial ...........................................0°C to 125°C
Industrial ......................................... –40°C to 125°C
Operating Ambient Temperature
Commercial ............................................ 0°C to 70°C
Industrial ........................................... –40°C to 85°C
Storage Temperature Range................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 16V, V
BAT
= 8V, V
MAX
(maximum operating V
CC
) = 28V,
R
S2
= R
S3
= 200Ω (see Block Diagram), V
CLN
= V
CC
. No load on any outputs unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Overall
Supply Current V
PROG
= 2.7V, V
CC
≤ 20V ● 4.5 6.8 mA
V
PROG
= 2.7V, 20V < V
CC
≤ 25V ● 4.6 7.0 mA
Sense Amplifier CA1 Gain and Input Offset Voltage 8V ≤ V
CC
≤ 25V , 0V ≤ V
BAT
≤ 20V
(With R
S2
= 200Ω, R
S3
= 200Ω)R
PROG
= 4.93k ● 95 100 105 mV
(Measured across R
S1
)(Note 2) R
PROG
= 49.3k ● 81012 mV
T
J
< 0°C 7 13 mV
V
CC
= 28V, V
BAT
= 20V
R
PROG
= 4.93k ● 90 110 mV
R
PROG
= 49.3k ● 713mV
T
J
< 0°C 6 14 mV
V
CC
Undervoltage Lockout (Switch OFF) Threshold Measured at UV Pin ● 678 V
UV Pin Input Current 0.2V ≤ V
UV
≤ 8V ● 0.1 5 µA
UV Output Voltage at UV
OUT
Pin In Undervoltage State, I
UVOUT
= 70µA ● 0.1 0.5 V
UV Output Leakage Current at UV
OUT
Pin 8V ≤ V
UV
, V
UVOUT
= 5V ● 0.1 3 µA
Reverse Current from Battery (When V
CC
Is V
BAT
≤ 20V, V
UV
≤ 0.4V 3 15 µA
Not Connected, V
SW
Is Floating)