EXPOSED PAD (PIN 13) IS GND, PCB CONNECTION OPTIONAL
*PIN 9 IS EN FOR LTC2956-1 AND IS
EN
FOR LTC2956-2
MS PACKAGE
12-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 135°C/W
*PIN 8 IS EN FOR LTC2956-1 AND IS
EN
FOR LTC2956-2
ORDER INFORMATION
LEAD FREE FINISH
LTC2956CUD-1#PBF
LTC2956CUD-2#PBF
LTC2956IUD-1#PBF
LTC2956IUD-2#PBF
LTC2956CMS-1#PBF
LTC2956CMS-2#PBF
LTC2956IMS-1#PBF
LTC2956IMS-2#PBF
TAPE AND REEL
LTC2956CUD-1#TRPBF
LTC2956CUD-2#TRPBF
LTC2956IUD-1#TRPBF
LTC2956IUD-2#TRPBF
LTC2956CMS-1#TRPBF
LTC2956CMS-2#TRPBF
LTC2956IMS-1#TRPBF
LTC2956IMS-2#TRPBF
PART MARKING*
LGNH
LGTC
LGNH
LGTC
29561
29562
29561
29562
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 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
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
2
2956fa
For more information
www.linear.com/LTC2956
LTC2956
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3.3V, R
COM
= 100k unless otherwise noted. (Note 2)
SYMBOL
V
IN
I
IN
PARAMETER
Supply Voltage Range
V
IN
Supply Current
Awake State,
PB
Hi
Sleep State,
PB
Hi
Off State,
PB
Hi
V
IN
Rising
CONDITIONS
l
l
l
l
l
ELECTRICAL CHARACTERISTICS
MIN
1.5
TYP
3
0.8
0.3
MAX
36
10
3
1
1.4
UNITS
V
µA
µA
µA
V
mV
V
UVL
V
UVL(HYST)
t
PERIOD
R
PERIOD
t
SLEEP_MIN
t
AWAKE_MIN
t
ONMAX
t
DB
t
PD(SLEEP)
t
PBOUT_FIRST
t
LONG
t
OFF
V
PB(MIN,MAX)
I
PB
V
PB(TH)
V
PB(HYST)
V
PB(OC)
R
PB
V
SLEEP(TH)
V
SLEEP(HYST)
I
SLEEP
V
ONMAX(TH)
I
ONMAX
V
IN
Undervoltage Lockout
V
IN
Undervoltage Lockout Hysteresis
Period Accuracy
Period-Setting Resistor Range
Minimum Sleep Duration
Minimum Awake Time
Maximum Awake Time
PB
Debounce Time
SLEEP
Propagation Delay
Width of First
PBOUT
Pulse After Entering Awake State
Long Power Down Time
OFFALERT
Pulse Width
PB
Voltage Range
PB
Input Current
PB
Input Threshold
PB
Input Hysteresis
PB
Open Circuit Voltage
PB
Pull-Up Resistance
SLEEP
Input Threshold Voltage
SLEEP
Input Hysteresis
SLEEP
Leakage Current
ONMAX Input Threshold Voltage
ONMAX Pull-Up Current
1.08
1.24
100
Wake-Up Timer
R
PERIOD
= 100kΩ
l
l
237
32.4
76
4
32
19
76
76
9.83
0.6
–36
–1
0.5
1.5
0.45
0.7
250
263
324
ms
kΩ
ms
ms
ms
ms
ms
ms
ms
s
s
V
µA
µA
V
V
V
Timing (Refer to Timing Diagram)
l
l
128
8
52
32
2
128
128
16.4
1
180
12
72
45
4
180
180
22.9
1.4
36
SLEEP
= 0V, C
ONMAX
= 3900pF
PB
Goes Low
→
EN Goes High
SLEEP
→
EN Transitions
R
LONG
= 9.76k, R
COM
= 100k
R
LONG
= Open, R
COM
= 100k
PB
= 2V
l
l
l
l
l
l
l
Input Pins:
PB,
ONMAX,
SLEEP
l
PB
= 0V
PB
= –36V
PB
Falling
I
PB
= 0µA, –1µA
SLEEP
Falling
SLEEP
= 1V
ONMAX Rising
ONMAX = 0V
l
l
–4
0.9
0.7
–8
–400
1.5
l
l
l
0.9
1
80
0
1.35
1.3
±100
1.5
–2.8
MΩ
V
mV
nA
V
µA
l
l
l
0.6
–1.1
1
–2
2956fa
For more information
www.linear.com/LTC2956
3
LTC2956
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3.3V, R
COM
= 100k unless otherwise noted. (Note 2)
SYMBOL
V
EN(VOH)
V
EN(VOH)
R
EN/EN
V
OL
PARAMETER
EN Voltage Output High (LTC2956-1)
EN
Voltage Output High (LTC2956-2)
EN/EN Pull-Up Resistance
Output Low Voltage (EN/EN)
Output Low Voltage (ONALERT,
PBOUT)
Output Low Voltage (OFFALERT)
Input Leakage Current (RANGE, LONG)
Leakage Current (PBOUT,
ONALERT, OFFALERT)
PERIOD Open Circuit Voltage
I = 1mA
I = 3mA
I = 6mA
V = 1.5V
V = 5V
I = –1µA
CONDITIONS
I = 0µA, –1µA
I = 0µA, –1µA
l
l
l
l
l
l
l
l
l
ELECTRICAL CHARACTERISTICS
MIN
1.5
V
IN
– 1.5
0.45
TYP
MAX
UNITS
V
Output Pins: EN/EN,
PBOUT, ONALERT, OFFALERT,
PERIOD, RANGE, LONG
V
IN
0.9
1.35
0.4
0.4
0.4
±100
±100
0.3
0.4
0.5
V
MΩ
V
V
V
nA
nA
V
I
OH
V
PERIOD
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
noted.
Note 3:
A substrate diode limits the V
IN
pin to a minimum of –0.3V with
respect to GND. This pin may go below –0.3V with current limited to less
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Embedded System
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