LTC4069EDC#TRMPBF Linear Technology, LTC4069EDC#TRMPBF Datasheet - Page 7

• Manufacturer Part Number: LTC4069EDC#TRMPBF
• Description: IC CHARGER LI-ION 6-DFN
• Manufacturer: Linear Technology

Specifications of LTC4069EDC#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

SIMPLIFIED BLOCK DIAGRAM
OPERATION
The LTC4069 is a linear battery charger designed primarily
for charging single cell lithium-ion batteries. Featuring
an internal P-channel power MOSFET, the charger uses a
constant-current/constant-voltage charge algorithm with
programmable current. Charge current can be programmed
up to 750mA with a fi nal fl oat voltage accuracy of ±0.6%.
The CHRG open-drain status output indicates if C/10 has
been reached. No blocking diode or external sense resistor
is required; thus, the basic charger circuit requires only
two external components. An internal termination timer
and trickle charge low-battery conditioning adhere to
battery manufacturer safety guidelines. Furthermore, the
V
CC
R
NOM
R
NTC
5
2
NTC
CHRG
V
CC
R7
R8
R9
R10
–
–
–
+
+
+
PROG
C1
C2
C3
+
C/10
0.1V
–
COLD
TOO
HOT
TOO
NTC_EN
2.9V
BAT
OR
115°C
T
DIE
REF
–
+
LOBAT
AND
R3
R4
R5
+
–
Figure 1. LTC4069 Block Diagram
TA
1V
0.1V
1.2V
SUSPEND
D3
–
CA
D1
+
LTC4069 is capable of operating from a USB power
source.
An internal thermal limit reduces the programmed charge
current if the die temperature attempts to rise above a
preset value of approximately 115°C. This feature protects
the LTC4069 from excessive temperature and allows the
user to push the limits of the power handling capability
of a given circuit board without risk of damaging the
LTC4069 or external components. Another benefi t of
the LTC4069 thermal limit is that charge current can
be set according to typical, not worst-case, ambient
M2
1
MP
6
PROG
R
PROG
4V
–
+
–
ENABLE
V
MA
4
CC
C4
V
CC
+
1
M1
1000
GND
R1
R2
MIN
SUSPEND
+
SHUTDOWN
VA
CHARGE CONTROL
D2
–
3.6V
LOGIC
1.2V
+
–
C5
LTC4069
OSCILLATOR
COUNTER
UVLO
BAT
4069 F01
3
4069fb
7
+