LTC1980 데이터 시트보기 (PDF) - Linear Technology
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LTC1980 Datasheet PDF : 16 Pages
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LTC1980
ABSOLUTE AXI U RATI GS
(Note 1)
VREG to GND ............................................. –0.5V to 12V
VBAT to GND ............................................. –0.5V to 12V
PROG, ISENSE .............................................. –0.5V to 5V
PROGT, REGFB, VC, BATT1, BATT2
TIMER, SS ............................................ –0.5V to VBIAS2
LDOFB, LDODRV .................................... –0.5V to VREG
WA, VBIAS1, REG ....................................... –0.5V to 12V
MODE ................................................... –0.5V to VBIAS1
VBIAS2 ......................................................... –0.5V to 5V
OVP ............................................................ –0.5V to 5V
PGND to GND .................................... Connect Together
Operating Ambient Temperature Range
(Note 2) ................................................. – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 125°C
Lead Temperature (Soldering, 10 sec)................ 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
PROG 1
PROGT 2
REGFB 3
VC 4
LDOFB 5
LDODRV 6
VREG 7
WA 8
BATT1 9
BATT2 10
RGTDR 11
PGND 12
24 SS
23 OVP
22 CAOUT
21 ISENSE
20 GND
19 VBIAS2
18 VBAT
17 TIMER
16 MODE
15 REG
14 BGTDR
13 VBIAS1
GN PACKAGE
24-LEAD NARROW PLASTIC SSOP
TJMAX = 125°C, θJA = 85°C/W
ORDER PART
NUMBER
LTC1980EGN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VBAT = 2.4V, VREG = 5V, VBAT unloaded.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
VBAT
Positive Supply Voltage, VBAT
2.85
10
V
VREG
Positive Supply Voltage, VREG
2.85
10
V
VFB
Feedback Voltage
REGFB Tied to VC
● 1.194 1.225 1.256
V
VPROGT
Voltage on PROGT Pin
PROGT Tied to VC
1.194 1.225 1.256
V
IBURST
Burst Mode Operation
Supply Current, Quiescent, VREG
Regulator Mode, REGFB = 1.5V
0.75
mA
IHIGH
Supply Current, Quiescent, VREG
Regulator Mode, REGFB = 0V
●
2 4.3
mA
ISHDN
Supply Current in Shutdown Mode, VREG
Mode = 0V
15
µA
VUVL
Positive-Going Undervoltage Lockout Voltage
From Either VBAT or VREG
2.45 2.7 2.85
V
VUVHYS
Undervoltage Lockout Hysteresis
From Either VBAT or VREG
100
mV
ISS
Soft-Start Ramp Current
BATT1 = 0, BATT2 = 0, Charger Mode
10
µA
VFLOAT0
Output Float Voltage in Constant Voltage Mode BATT1 = 0, BATT2 = 0
● 4.059 4.1 4.141
V
VFLOAT1
Output Float Voltage in Constant Voltage Mode BATT1 = 1, BATT2 = 0
● 4.158 4.2 4.242
V
VFLOAT2
Output Float Voltage in Constant Voltage Mode BATT1 = 0, BATT2 = 1 (Note 3)
● 8.118 8.2 8.282
V
VFLOAT3
Output Float Voltage in Constant Voltage Mode BATT1 = 1, BATT2 = 1 (Note 3)
● 8.316 8.4 8.484
V
VFLOAT4
Output Float Voltage in Constant Voltage Mode BATT1 = Open, BATT2 = Don’t Care ● 1.207 1.225 1.243
V
Measured from OVP Input
VRCHG0
Recharge Threshold, Delta Voltage with Respect BATT2 = 0, BATT1 = 0 or 1
to Float Voltage
200
mV
VRCHG1
Recharge Threshold, Delta Voltage with Respect BATT2 = 1, BATT1 = 0 or 1
to Float Voltage
400
mV
1980f
2
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