PACKAGE/ORDERING INFORMATION
SPECIFIED
ORDER NUMBER
PACKAGE
DESCRIPTION
TEMPERATURE
RANGE
MARKING
INFORMATION
PACKAGE
OPTION
SGM4054YN5/TR
SOT23-5
- 40°C to +85°C
4054
Tape and Reel, 3000
ABSOLUTE MAXIMUM RATINGS
Storage Temperature Range.............. –65℃ to +150℃
Junction Temperature ...........................................160℃
Operating Temperature Range ...........–40℃ to +85℃
Lead Temperature Range (Soldering 10 sec)
..................................................260℃
ESD Susceptibility
HBM........................................................................4000V
MM............................................................................400V
CAUTION
This integrated circuit can be damaged by ESD.
SG Micro-electronics recommends that all
integrated circuits be handled with appropriate
precautions. Failure to observe proper handling and
installation procedures can cause damage.
ESD damage can range from subtle performance
degradation to complete device failure. Precision
integrated circuits may be more susceptible to
damage because very small parametric changes
could cause the device not to meet its published
specifications.
NOTES
1. Stresses above those listed under Absolute Maximum
Ratings may cause permanent damage to the device. This
is a stress rating only; functional operation of the device at
these or any other conditions above those indicated in the
operational section of this specification is not implied.
Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
PIN DESCRIPTION
NAME
CHRG
GND
BAT
FUNCTION
Open-Drain Charger Status indication pin. When the battery is charging, the
CHRG
pin is pulled low by an internal N-channel
MOSFET. When the charge cycle is completed, a weak pull-down of approximately 20μA is connected to the
CHRG
pin, indicating
an “AC present” condition. When the SGM4054 detects an undervoltage lockout condition,
CHRG
is forced high impedance.
Ground
Charge Current Output pin, connecting with Li-ion battery. Provides charge to 4.2V. An internal precision resistor divider from this
pin sets the float voltage which is disconnected in shutdown mode.
Positive Input Supply Voltage. Provides power to the charger. V
+
can range from 4.25V to 6.5V and should be bypassed with at least
a 1μF capacitor. When V
+
drops to within 54mV of the BAT pin voltage, the SGM4054 enters shutdown mode, dropping I
BAT
to less
than 3μA.
Charge Current Program, Charge Current Monitor and Shutdown control Pin. The charge current is programmed by connecting a
1% resistor from RPROG pin to ground. 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:
I
BAT
= (V
PROG
/R
PROG
) • 1000
The PROG pin can also be used to shut down the charger. Disconnecting the program resistor from ground allows a 3uAcurrent to
pull this pin to High When it reaches the 1.23V shutdown threshold voltage, the charger enters shutdown mode, charging stops
and the input supply current drops to 25μA, this pin is also clamped to approximately 2.4V. Driving this pin to voltages beyond the
clamp voltage will draw currents as high as 1.5mA. Reconnecting R
PROG
to ground will return the charger to normal operation.
V
+
PROG
3
SGM4054
TOREX [ TOREX SEMICONDUCTOR ]
