LTC2937C ................................................ 0°C to 70°C
LTC2937I .............................................–40°C to 85°C
LTC2937H .......................................... –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
Maximum Junction Temperature .......................... 130°C
UHE PACKAGE
28-LEAD (5mm
×
6mm) PLASTIC QFN
T
JMAX
= 130°C,
θ
JA
= 43°C/W
EXPOSED PAD (PIN 29) PCB CONNECTION TO GND OPTIONAL
ORDER INFORMATION
LEAD FREE FINISH
LTC2937CUHE#PBF
LTC2937IUHE#PBF
LTC2937HUHE#PBF
TAPE AND REEL
LTC2937CUHE#TRPBF
LTC2937IUHE#TRPBF
LTC2937HUHE#TRPBF
http://www.linear.com/product/LTC2937#orderinfo
PART MARKING*
2937
2937
2937
PACKAGE DESCRIPTION
28-Lead (5mm × 6mm) Plastic QFN
28-Lead (5mm × 6mm) Plastic QFN
28-Lead (5mm × 6mm) Plastic QFN
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
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/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
2937fa
For more information
www.linear.com/LTC2937
3
LTC2937
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C and VPWR = 12V. (Note 2)
SYMBOL
V
VPWR
I
VPWR
VDD
REG
V
OP
V
UVL
V
UVL(HYST)
V
MON
V
RES
V
MON(ACC)
PARAMETER
VPWR Supply Input Operating Range
VPWR Supply Current
VDD Regulated Output
VDD Operating Range
VDD Undervoltage Lockout
VDD Undervoltage Lockout Hysteresis
Vn Monitoring Thresholds (n = 1
through 6) (Note 3)
Vn Threshold Programming LSB
Resolution
Vn Threshold Accuracy by Code
(Note 4)
Sequencing Complete, No VDD Load Writing to
EEPROM
VPWR ≥ 4.5V, I
VDD
= –1mA
VDD Connected to VPWR
VDD Rising
VDD Falling
Adjustable Range
Low Range
High Range
Adjustable Range
Low Range
High Range
C-, I-Grades:
Codes 155 to 255
Codes 55 to 154
Codes 5 to 54
H-Grade:
Codes 155 to 255
Codes 55 to 154
Codes 5 to 54
Sequence Up Threshold Achieved
2 LSB Overdrive of Configured Threshold
10 LSB Overdrive of Configured Threshold
Low Range and High Range
Adjustable Range, V = 1.2V
V = 0.4V
V = 1.8V
High and Low Range
Adjustable Range (Positive Polarity)
Adjustable Range (Negative Polarity)
(Notes 6, 7)
1 Cycle = 1 STORE Command (Notes 6, 7)
STORE Command
RESTORE Command
b[15:13] = 000b
b[15:13] = 001b
b[15:13] = 010b
b[15:13] = 011b
b[15:13] = 100b
b[15:13] = 101b
b[15:13] = 110b
b[15:13] = 111b
l
l
l
l
l
l
l
l
l
l
ELECTRICAL CHARACTERISTICS
CONDITIONS
l
l
l
l
l
l
MIN
4.5
TYP
MAX
16.5
1
3
UNITS
V
mA
mA
V
V
V
mV
Device Power
3.234
2.9
2.5
3.3
2.7
75
3.366
5.5
2.85
V1, V2, V3, V4, V5, V6
0.2
0.5
1
4
10
20
±0.75
±0.75
±1.5
±1
±1
±1.5
–4
–5
35
10
400
25
20
300
50
1.12
20
10,000
130
2
0
1.4
5.8
22
46
180
370
1480
0.05
1.6
6.4
26
51
200
410
1640
0.1
1.9
7.5
30
60
230
475
1900
600
40
35
400
120
1.2
–6
1.2
3
6
V
V
V
mV
mV
mV
%
%
%
%
%
%
%
µs
µs
kΩ
nA
Ω
mA
mV
mV
V
Years
Cycles
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
2937fa
V
MON(HYST)
Temporary Sequence-Up Threshold
Hysteresis (Note 5)
t
PD
R
IN
I
LKG
R
ON
I
AD(MAX)
V
DTH
EEPROM
Retention
Endurance
t
PT
t
RT
RSTB
t
RST
Programmable Reset Delay
(Register 0x22, RSTB_CONFIG)
Programming Time (Note 8)
Restore Time
Vn Comparator Propagation Delay
Vn Input Resistance
Vn Input Leakage Current
Vn Discharge On Resistance
Vn Discharge Current
Vn Discharge Threshold
l
l
l
l
l
l
l
l
25
900
±15
50
45
500
190
1.28
l
l
l
l
l
l
l
l
l
l
l
l
4
For more information
www.linear.com/LTC2937
LTC2937
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
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