LTC2942CDCB-1#PBF Linear Technology, LTC2942CDCB-1#PBF Datasheet - Page 6

• Manufacturer Part Number: LTC2942CDCB-1#PBF
• Description: IC, BATTERY FUEL GAUGE LI-ION 5.5V DFN-6
• Manufacturer: Linear Technology

Specifications of LTC2942CDCB-1#PBF

• Battery Management Function: Fuel Gauge, Charge Controller
• Battery Type: Li-Ion
• Supply Voltage Range: 2.7V To 5.5V
• Battery Ic Case Style: DFN
• No. Of Pins: 6
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

pin FuncTions
LTC2942
SENSE
Supply. Connect to the load/charger side of the sense
resistor. V
GND (Pin 2): Device Ground. Connect directly to the nega-
tive battery terminal.
SCL (Pin 3): Serial Bus Clock Input.
SDA (Pin 4): Serial Bus Data Input and Output.
AL/CC (Pin 5): Alert Output or Charge Complete Input.
Configured either as an SMBus alert output or charge
complete input by control register bits B[2:1]. At power-up,
the pin defaults to alert mode conforming to the SMBus
block Diagram

+
(Pin 1): Positive Current Sense Input and Power
SENSE +
operating range is 2.7V to 5.5V.
1
6
2
SENSE
SENSE
GND
+
–
TEMPERATURE
V
SUPPLY
SENSOR
MUX
IN
GENERATOR
REFERENCE
COULOMB COUNTER
REF
REF
REF
+
–
ADC
LTC2942
OSCILLATOR
CLK
CLK
alert response protocol. It behaves as an open-drain logic
output that pulls to GND when any threshold register value
is exceeded. When configured as a charge complete input,
connect to the charge complete output from the battery
charger circuit. A high level at CC sets the value of the
accumulated charge (registers C, D) to FFFFh.
SENSE
SENSE
resistor. The voltage between SENSE
remain within ±50mV in normal operation. SENSE
the input for the ADC in voltage measurement mode.
Exposed Pad (Pin 7): Do Not Connect.
–
–
to the positive battery terminal side of the sense
(Pin 6): Negative Current Sense Input. Connect
ACCUMULATED
REGISTERS
REGISTER
DATA AND
CONTROL
CHARGE
CC
SMBus
I
2
C/
AL
AL/CC
SDA
SCL
2942 BD
–
and SENSE
5
3
4
–
+
is also
must
2942fa