MAX8568A Просмотр технического описания (PDF) - Maxim Integrated
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MAX8568A Datasheet PDF : 17 Pages
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Complete Backup-Management ICs
for Lithium and NiMH Batteries
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 7, VIN = VINOK = 3.6V, VBK = 1.4V, VNI/LI = VBKSU = 3.3V, VBKV = GND = PGND = 0V, VSTRTV = VTERMV = 1.2V,
R5 = 250kΩ, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3)
PARAMETER
IN Voltage Range
IN Operating Current
CHGI Current Limit
CHGI Resistor Range
BK Charge Voltage Limit
NiMH Mode BK High Threshold Voltage,
VBK(NIHI)
NiMH Mode BK Low Threshold Voltage,
VBK(NILO)
REF Output Voltage
REF Load Regulation
REF Line Regulation
INOK Threshold Voltage
NI/LI Logic-Level High
NI/LI Logic-Level Low
OD_ On-Resistance
BACKUP STEP-UP (Note 2)
BK Input Undervoltage Lockout
BK Input Voltage
Quiescent Current into BKSU
Quiescent Current into BK
BKV Feedback Voltage
BKSU Output-Voltage Accuracy
BKSU Output Voltage Range
n-Channel Switch On-Resistance
p-Channel Switch On-Resistance
CONDITIONS
Charger on, not including charge current
RCHGI = 169kΩ, VBK = 1.3V
VBK = 1.3V
VIN = 5.5V, VNI/LI = 0V
VIN = 3.8V, VNI/LI = 0V, VTERMV = 1V
VIN = VNI/LI = 3.6V
VTERMV = 1.2V
VSTRTV = 1.2V
IREF = 1µA
IREF = 1µA to 50µA
VIN = 3V to 5.5V, IREF = 1µA
VINOK falling
VINOK rising
VBKSU = 3.3V
VBKSU = 3.3V
VBKSU = 3.6V
VNI/LI = VBKSU = 3.3V, falling trip point
ILDO = 0mA, not switching
IBKSU = ILDO = 0mA, not switching
VBKV = 0V
VBKV = VBKSU
ILX = 200mA
ILX = 200mA
MIN
2.8
8
50
4.116
3.420
1.746
1.37
1.17
1.225
2.38
2.40
1.8
1.05
1.162
3.17
2.4
2.5
MAX
5.5
90
12
1800
4.310
3.605
1.854
UNITS
V
µA
mA
kΩ
V
1.43
V
1.23
V
1.275
V
10
mV
7
mV
2.48
V
2.54
V
0.4
V
30
Ω
1.21
V
5.5
V
25
µA
4
µA
1.258
V
3.43
V
2.6
5.0
V
1
Ω
2
Ω
4 _______________________________________________________________________________________
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