Linear Technology LTC2944, Manual

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LTC2944
2
2944fa
For more information www.linear.com/LTC2944
pin conFiguraTion absoluTe MaxiMuM raTings
(Notes 1, 2)
TOP VIEW
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
5
6
7
8
9
4
3
2
1 SENSE
+
GND
GND
SCL
SENSE
–
GND
ALCC
SDA
T
JMAX
= 150°C, θ
JA
= 100°C/W
EXPOSED PAD (PIN 9) PCB GND CONNECTION OPTIONAL
elecTrical characTerisTics
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Requirements
V
SENSE+
Supply Voltage
l
3.6 60 V
I
SUPPLY
Supply Current (Note 3) Battery Gas Gauge On, ADC Sleep
Battery Gas Gauge On, ADC On
Shutdown
l
l
l
80
850
15
150
950
30
µA
µA
µA
I
SENSE+
Pin Current (Note 3) Battery Gas Gauge On, ADC Sleep
Battery Gas Gauge On, ADC On
Shutdown
80
500
15
µA
µA
µA
I
SENSE–
Pin Current (Note 3) Battery Gas Gauge On, ADC Sleep
Battery Gas Gauge On, ADC On
Shutdown
1
350
1
µA
µA
µA
V
UVLO
Undervoltage Lockout Threshold V
SENSE+
Falling
l
3.0 3.5 3.6 V
Coulomb Counter
V
SENSE
Sense Voltage Differential Input
Range
V
SENSE+
– V
SENSE–
l
±50 mV
R
IDR
Differential Input Resistance Across
SENSE
+
and SENSE
–
(Note 8)
400 kΩ
q
LSB
Charge LSB (Note 4) Prescaler M = 4096(Default), R
SENSE
= 50mΩ 0.340 mAh
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2)
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2944CDD#PBF LTC2944CDD#TRPBF LGCR 8-Lead (3mm × 3mm) Plastic DFN 0°C to 70°C
LTC2944IDD#PBF LTC2944IDD#TRPBF LGCR 8-Lead (3mm × 3mm) Plastic DFN –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.
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.
Supply Voltage (SENSE
+
) ........................... –0.3V to 65V
SCL, SDA, ALCC Voltage .............................. –0.3V to 6V
SENSE
–
...............(–0.3V + V
SENSE
+
) to (V
SENSE
+
+ 0.3V)
Operating Ambient Temperature Range
LTC2944C ............................................... 0°C to 70°C
LTC2944I ............................................–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
http://www.linear.com/product/LTC2944#orderinfo