Datasheet
2011-2013 Microchip Technology Inc. DS20005049C-page 9
MCP73830/L
3.0 PIN DESCRIPTION
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLES
3.1 Battery Management Input Supply
(V
DD
)
A supply voltage of [V
REG
(Typical) + 0.3V] to 6.0V is
recommended. Bypass to V
SS
with a minimum of 1 µF.
3.2 Battery Charge Control Output
(V
BAT
)
Connect to the positive terminal of the battery. Bypass
to V
SS
with a minimum of 1 µF to ensure loop stability
when the battery is disconnected.
3.3 Battery Management 0V Reference
(V
SS
)
Connect to the negative terminal of the battery and
input supply.
3.4 Status Output (STAT)
STAT is an open-drain logic output for connection to an
LED for charge status indication in stand-alone
applications. Alternatively, a pull-up resistor can be
applied for interfacing to a host microcontroller. Refer to
Table 5-1 for a summary of the status output during a
charge cycle.
3.5 Current Regulation Set (PROG)
The fast charge current is set by placing a resistor from
PROG to V
SS
during Constant Current (CC) mode.
Refer to Section 5.4 “Constant Current Mode – Fast
Charge” for details.
3.6 Charge Enable (CE)
The MCP73830/L is always enabled with an internal
pull-down resistor. Pulling the CE pin high will enter
Standby mode.
3.7 Exposed Pad (EP)
The Exposed Thermal Pad (EP) should be connected
to the exposed copper area on the Printed Circuit
Board (PCB) for thermal enhancement purposes.
Additional vias on the copper area under the
MCP73830/L device can improve the performance of
heat dissipation and simplify the assembly process.
MCP73830/L
Symbol I/O Function
TDFN
1V
SS
— Battery management 0V reference.
2 STAT O Battery charge status output.
3V
BAT
I/O Charge control output. Regulates the charge current and battery voltage.
The pin is disconnected during Shutdown mode.
4V
DD
I Input power supply.
5CE
I Charge Enable pin. Pull the pin high to disable the device. It is internally
pulled down. Leave the pin float if not used.
6 PROG I/O Battery charge current regulation program.
7 EP — Exposed pad.