參數(shù)資料
型號(hào): LTC3554EUD#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: 0.6 A BATTERY CHARGE CONTROLLER, 2590 kHz SWITCHING FREQ-MAX, PQCC20
封裝: 3 X 3 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, QFN-20
文件頁(yè)數(shù): 31/36頁(yè)
文件大小: 418K
代理商: LTC3554EUD#PBF
LTC3554/LTC3554-2
4
35542fb
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
BVIN
Input Supply Voltage
(Note 9)
l
2.7
5.5
V
VOUT UVLO
VOUT Falling
VOUT Rising
BVIN Connected to VOUT Through Low
Impedance. VOUT UVLO Disables the
Switching Regulators.
2.5
2.6
2.8
2.9
V
fOSC
Oscillator Frequency
FSEL High
FSEL Low
1.91
0.955
2.25
1.125
2.59
1.295
MHz
IFB1
IFB2
FB1 Input Current (Note 8)
FB2 Input Current (Note 8)
–0.05
0.05
μA
RSW1_PD
RSW2_PD
SW1 Pull-Down in Shutdown
SW2 Pull-Down in Shutdown
PWR_ON1 = 0V
PWR_ON2 = 0V
10
Logic Input Pins (FSEL, STBY)
Input High Voltage
1.2
V
Input Low Voltage
0.4
V
Input Current
–1
1
μA
Switching Regulator 1 in Normal Operation (STBY Low)
ILIM1
Peak PMOS Current Limit
PWR_ON1 = 3.8V (Note 7)
300
450
600
mA
VFB1
Regulated Feedback Voltage
PWR_ON1 = 3.8V
l
780
800
820
mV
D1
Max Duty Cycle
100
%
RP1
RDS(ON) of PMOS
ISW1 = 100mA
1.1
Ω
RN1
RDS(ON) of NMOS
ISW1 = –100mA
0.7
Ω
Switching Regulator 1 in Standby Mode (STBY High)
VFB1_LOW
Feedback Voltage Threshold
PWR_ON1 = 3.8V, VFB1 Falling
l
770
800
820
mV
ISHORT1_SB
Short-Circuit Current
10
21
50
mA
VDROP1_SB
Standby Mode Dropout Voltage
PWR_ON1 = 2.9V, ISW1 = 5mA, VFB1 = 0.77V,
VOUT = 2.9V, BVIN = 2.9V
25
60
mV
Switching Regulator 2 in Normal Operation (STBY Low)
ILIM2
Peak PMOS Current Limit
PWR_ON2 = 3.8V (Note 7)
300
450
600
mA
VFB2
Regulated Feedback Voltage
PWR_ON2 = 3.8V
l
780
800
820
mV
D2
Max Duty Cycle
100
%
RP2
RDS(ON) of PMOS
ISW2 = 100mA
1.1
Ω
RN2
RDS(ON) of NMOS
ISW2 = –100mA
0.7
Ω
Switching Regulator 2 in Standby Mode (STBY High)
VFB2_LOW
Feedback Voltage Threshold
PWR_ON2 = 3.8V, VFB2 Falling
l
770
800
820
mV
ISHORT2_SB
Short-Circuit Current
10
21
50
mA
VDROP2_SB
Standby Mode Dropout Voltage
PWR_ON2 = 2.9V, ISW2 = 5mA, VFB2 = 0.77V,
VOUT = 2.9V, BVIN = 2.9V
25
60
mV
SWITCHING REGULATOR ELECTRICAL CHARACTERISTICS
The
l denotes specications that apply over the full operating temperature range, otherwise specications are at TA = 25°C (Note 2).
VOUT = BVIN = 3.8V, PWR_ON1 = PWR_ON2 = 0V, unless otherwise noted.
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