EXPOSED PAD (PIN 13) PCB CONNECTION TO GND IS OPTIONAL
ORDER INFORMATION
LEAD FREE FINISH
LTC4231CUD-1#PBF
LTC4231CUD-2#PBF
LTC4231IUD-1#PBF
LTC4231IUD-2#PBF
LTC4231HUD-1#PBF
LTC4231HUD-2#PBF
LTC4231CMS-1#PBF
LTC4231CMS-2#PBF
LTC4231IMS-1#PBF
LTC4231IMS-2#PBF
LTC4231HMS-1#PBF
LTC4231HMS-2#PBF
TAPE AND REEL
LTC4231CUD-1#TRPBF
LTC4231CUD-2#TRPBF
LTC4231IUD-1#TRPBF
LTC4231IUD-2#TRPBF
LTC4231HUD-1#TRPBF
LTC4231HUD-2#TRPBF
LTC4231CMS-1#TRPBF
LTC4231CMS-2#TRPBF
LTC4231IMS-1#TRPBF
LTC4231IMS-2#TRPBF
LTC4231HMS-1#TRPBF
LTC4231HMS-2#TRPBF
PART MARKING*
LGMX
LGSP
LGMX
LGSP
LGMX
LGSP
42311
42312
42311
42312
42311
42312
PACKAGE DESCRIPTION
12-Lead (3mm × 3mm) Plastic QFN
12-Lead (3mm × 3mm) Plastic QFN
12-Lead (3mm × 3mm) Plastic QFN
12-Lead (3mm × 3mm) Plastic QFN
12-Lead (3mm × 3mm) Plastic QFN
12-Lead (3mm × 3mm) Plastic QFN
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
TEMPERATURE RANGE
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
Rev. B
2
For more information
www.analog.com
LTC4231
ORDER INFORMATION
LEAD FREE FINISH
AUTOMOTIVE PRODUCTS**
LTC4231IMS-1#WPBF
LTC4231IMS-2#WPBF
LTC4231HMS-1#WPBF
LTC4231HMS-2#WPBF
LTC4231IMS-1#WTRPBF
LTC4231IMS-2#WTRPBF
42311
42312
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC4231HMS-1#WTRPBF 42311
LTC4231HMS-2#WTRPBF 42312
Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Tape and reel specifications.
Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
**Versions
of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These
models are designated with a #W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your
local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for
these models.
ELECTRICAL CHARACTERISTICS
SYMBOL
IN
V
IN
V
IN(UVL)
∆V
IN(HYST)
I
CC
Input Supply Voltage Range
Input Supply Undervoltage Lockout
Input Supply Undervoltage Lockout
Hysteresis
Supply Current (Average)
Normal On, Voltage or Current Fault
Start-Up or Overcurrent
Shutdown
Reverse Input
SENSE
∆V
SENSE(CB)
∆V
SENSE(ACL)
I
SENSE
GATE, SOURCE
∆V
GATE
∆V
GATE(H)
V
GATE(L)
I
GATE(UP)
I
GATE(FAST)
I
GATE(SLOW)
t
D(ON)
t
RETRY
t
PHL(ILIM)
External N-Channel Gate Drive
(V
GATE
– V
SOURCE
)
∆V
GATE
(V
GATE
– V
SOURCE
) Threshold
That Deactivates the Charge Pump
GATE Low Threshold
GATE Pull-Up Current
GATE Fast Pull-Down Current
GATE Slow Pull-Down Current
Turn-On Debounce Delay
Auto-Retry Delay
Overcurrent to GATE Low Propagation
Delay
Circuit Breaker Threshold (V
IN
– V
SENSE
)
Analog Current Limit
SENSE Input Current
PARAMETER
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. IN = 12V, unless otherwise noted.
CONDITIONS
l
MIN
2.7
2
TYP
MAX UNITS
36
V
V
mV
10
20
600
1
2
–5
53
90
1
10
18
10
18
1.8
–13
µA
µA
µA
µA
µA
mA
mV
mV
µA
V
V
V
V
V
µA
mA
mA
60
0.73
1
ms
s
µs
IN Rising
l
2.3
200
2.6
(Note 5)
I
GATE
≤ –0.1µA, C
GATE-SOURCE
= 1nF, (C-Grade, I-Grade)
(H-Grade)
SHDN
Low, GATE Pulled to GND, (C-Grade, I-Grade)
(H-Grade)
IN, SENSE = –40V
l
l
l
l
l
l
4
4
300
0.3
0.3
–2.5
47
65
50
80
0.3
4.5
10
5.5
11
0.4
–7
70
0.6
20
0.27
6.2
11.4
6.5
11.7
1.2
–10
130
1
40
0.5
0.5
l
During Output Short-Circuit
SHDN
= High, SENSE = 12V
V
IN
< 7V, I
GATE
= 0, –0.1µA
V
IN
≥ 7V, I
GATE
= 0, –0.1µA
V
IN
< 7V
V
IN
≥ 7V
To Enter Shutdown or Voltage Fault
GATE On, GATE = 1V
∆V
SENSE
= 0.5V, ∆V
GATE
= 5V
SHDN
= 0V, ∆V
GATE
= 5V
UVL = UVH = 2V, OV = 0V,
SHDN
= Step 0V to 5V
LTC4231-2
∆V
SENSE
= Step 0mV to 300mV,
C
GATE
= 1nF, ∆V
GATE
Crosses 1V
l
l
l
l
l
l
l
l
l
l
l
l
l
For more information
www.analog.com
3
Rev. B
LTC4231
ELECTRICAL CHARACTERISTICS
SYMBOL
V
UV
V
OV
V
OV(HYST)
I
LEAK(0.9V)
I
LEAK(12V)
R
ON(GNDSW)
V
OL
V
SHDN
t
PERIOD
t
SAMPLE
TIMER
t
CB
V
TIMER(H)
V
TIMER(L)
I
TIMER(UP)
I
TIMER(DN)
Circuit Breaker Delay
TIMER High Threshold
TIMER Low Threshold
TIMER Pull-Up Current
TIMER Pull-Down Current
C
T
= 100nF
TIMER Rising
TIMER Falling
TIMER = 0.5V, Circuit Breaker Tripped
TIMER = 0.5V, Circuit Breaker Recovery
l
l
l
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. IN = 12V, unless otherwise noted.
PARAMETER
UVL, UVH Threshold
OV Threshold
OV Hysteresis
UVL, UVH and OV Leakage Current
UVL, UVH, OV, GNDSW, STATUS and
SHDN
Leakage Current
Switch Resistance
STATUS Output Low Voltage
SHDN
Input Threshold
Sampling Period
Sampling Width
I = 2mA
V = 0.9V (C-Grade, I-Grade)
(H-Grade)
V = 12V (C-Grade, I-Grade)
(H-Grade)
OV Rising
CONDITIONS
l
l
l
l
l
l
l
l
l
l
l
l
MIN
0.776
0.776
3
TYP
MAX UNITS
V
V
mV
nA
nA
nA
nA
Ω
V
V
ms
µs
ms
V
V
µA
µA
UVL, UVH, OV, GNDSW, STATUS and
SHDN
0.795 0.814
0.795 0.814
15
0
0
0
0
80
0.2
0.4
5
100
1.7
1.170
0.07
–35
3
0.8
10
200
2.4
0.1
–50
5
30
±10
±100
±100
±500
200
0.4
1.5
15
300
3.5
0.13
–65
7
1.193 1.216
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to GND unless otherwise
specified.
Note 3:
These pins can be tied to voltages below –0.3V through a
resistance that limits the current below 1mA.
Note 4:
An internal clamp limits GATE to a minimum of 13V above
SOURCE. Driving this pin to voltages beyond this clamp may damage the
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