Rainbow Electronics MAX1873 User Manual
Page 2
MAX1873
Simple Current-Limited Switch-Mode
Li+ Charger Controller
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
DCIN
= V
CSSP
= V
CSSN
= 18V, V
ICHG/EN
= V
REF
, V
VADJ
= V
REF
/2. MAX1873R: V
BATT
= V
CSB
= 8.4V;
MAX1873S: V
BATT
= V
CSB
= 12.6V; MAX1873T: V
BATT
= V
CSB
= 16.8V; T
A
= 0°C to +85°C. Typical values are at T
A
= +25°C, unless
otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
CSSP, CSSN, DCIN to GND ...................................-0.3V to +30V
VL, ICHG/EN to GND................................................-0.3V to +6V
VH, EXT to DCIN.......................................................-6V to +0.3V
VH, EXT to GND ......................................(V
DCIN
+ 0.3V) to -0.3V
EXT to VH .................................................................+6V to -0.3V
DCIN to VL..............................................................+30V to -0.3V
VADJ, REF, CCI, CCV, CCS,
IOUT to GND.............................................-0.3V to (VL + 0.3V)
BATT, CSB to GND.................................................-0.3V to +20V
CSSP to CSSN.......................................................-0.3V to +0.6V
CSB to BATT..........................................................-0.3V to +0.6V
VL Source Current ............................................................+50mA
VH Sink Current ................................................................+40mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C..........+667mW
Operating Temperature Range
MAX1873_EEE ................................................-40°C to +85°C
Junction Temperature ..................................................... +150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°C
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT SUPPLY AND REFERENCE
DCIN Input Voltage Range
6
28
V
6.0V < V
DCIN
< 28V
4
7
mA
D C IN Qui escent S up p l y C ur r ent
DCIN
≤ BATT
0.1
10
µA
DCIN to BATT Undervoltage Threshold
CSSP = DCIN, input falling
0.05
0.175
V
DCIN to BATT Undervoltage Threshold
CSSP = DCIN, input rising
0.22
0.38
V
VL Output Voltage
6.0V < V
DCIN
< 28V
5.15
5.40
5.65
V
VL Output Load Regulation
I
VL
= 0 to 3mA
15
50
mV
REF Output Voltage
I
REF
= 21µA (200k
Ω load)
4.179
4.20
4.221
V
2
6
mV
REF Line Regulation
6.0V < V
DCIN
< 28V
22
65
ppm/V
REF Load Regulation
I
REF
= 0 to 1mA
6
13
mV
SWITCHING REGULATOR
PWM Oscillator Frequency
270
300
330
kHz
EXT Driver Source On-Resistance
4
7
Ω
EXT Driver Sink On-Resistance
2.5
4.5
Ω
VH Output Voltage
DCIN - VH, 6V < V
DCIN
<28V, I
VH
= 0 to 20mA
4.75
5.75
V
CSSN/CSSP Input Current
V
CSSN
/V
CSSP
= 28V, V
DCIN
= 28V
70
200
µA
CSSN/CSSP Off-State Leakage
V
DCIN
= V
SSN
/V
CSSP
= 18V, V
BATT
= V
CSB
= 18V
1.5
5
µA
ICHG/EN = 0 (charger disabled)
0.2
1
BATT, CSB Input Current
ICHG/EN = REF (charger enabled)
250
500
µA
BATT, CSB Input Current
DCIN
≤ BATT (input power removed)
1.5
5
µA