LTC4065LEDC#TRMPBF Linear Technology, LTC4065LEDC#TRMPBF Datasheet - Page 6

• Manufacturer Part Number: LTC4065LEDC#TRMPBF
• Description: IC CHARGER LI-ION 6-DFN
• Manufacturer: Linear Technology

Specifications of LTC4065LEDC#TRMPBF

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion)
• Voltage - Supply: 3.75 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 6-WFDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PI FU CTIO S
LTC4065L/LTC4065LX
GND (Pin 1): Ground.
CHRG (Pin 2): Open-Drain Charge Status Output. The
charge status indicator pin has three states: pull-down,
pulse at 2Hz and high impedance state. This output can be
used as a logic interface or as an LED driver. When the
battery is being charged, the CHRG pin is pulled low by an
internal N-channel MOSFET. When the charge current
drops to 10% of the full-scale current, the CHRG pin is
forced to a high impedance state. If the battery voltage
remains below 2.9V for one quarter of the charge time, the
battery is considered defective and the CHRG pin pulses at
a frequency of 2Hz.
BAT (Pin 3): Charge Current Output. Provides charge
current to the battery and regulates the final float voltage
to 4.2V. An internal precision resistor divider on this pin
sets the float voltage and is disconnected in shutdown
mode.
V
provides power to the charger. V
to 5.5V. This pin should be bypassed with at least a 1µF
capacitor. When V
voltage, the LTC4065L enters shutdown mode, dropping
I
6
BAT
CC
U
to about 1µA.
(Pin 4): Positive Input Supply Voltage. This pin
U
CC
U
is within 32mV of the BAT pin
CC
can range from 3.75V
EN (Pin 5): Enable Input Pin. Pulling this pin above the
manual shutdown threshold (V
the LTC4065L in shutdown mode. In shutdown mode, the
LTC4065L has less than 20µA supply current and less than
1µA battery drain current. Enable is the default state, but
the pin should be tied to GND if unused.
PROG (Pin 6): Charge Current Program and Charge Cur-
rent Monitor Pin. Connecting a 1% resistor, R
ground programs the charge current. When charging in
constant-current mode, this pin servos to 1V. In all modes,
the voltage on this pin can be used to measure the charge
current using the following formula:
Floating the PROG pin sets the charge current to zero.
Exposed Pad (Pin 7): Ground. The Exposed Pad must be
soldered to the PCB ground to provide both electrical con-
tact and rated thermal performance.
I
BAT
=
R
V
PROG
PROG
• 205
MS
is typically 0.82V) puts
PROG
4065lxfa
, to