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參數(shù)資料
| 型號(hào)： | LTC3445EUF#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | 0.8 A SWITCHING REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封裝： | 4 X 4 MM, LEAD FREE, PLASTIC, MO-220-WGGD, QFN-24 |
| 文件頁(yè)數(shù)： | 18/24頁(yè) |
| 文件大?。?/td> | 470K |
| 代理商： | LTC3445EUF#TRPBF |
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3
LTC3445
3445fa
The
● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC1 = VCC2 = 3.6V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IS
Additional Input DC Bias Current For Buck (Note 4)
Active Mode
VOUT = 90%, ILOAD = 0A
220
A
Sleep Mode
VOUT = 103%, ILOAD = 0A
6
A
fOSC
Nominal Oscillator Frequency
VOUT = 100%
●
1.2
1.5
1.8
MHz
VOUT = 0V
300
kHz
RPFET
RDS(ON) of P-Channel FET
ISW = 100mA
0.45
RNFET
RDS(ON) of N-Channel FET
ISW = –100mA
0.325
ILSW
SW Leakage
VRUN = 0V, VSW = 0V or 5V, VCC1 = 5V
1
A
LDO1
IS
Additional DC Bias for LDO1
23
30
A
VOUT
Regulated Output Voltage
2.5V < VIN < 5.5V, 1mA < ILOAD < 50mA
0.582
VCC2 –V
0.3
Line Regulation
VCC2 = 2.5V to 5.5V, ILOAD = 1mA, VOUT = 1.2V
1
5
mV
Load Regulation
VCC2 = 2.5V, ILOAD = 1mA to 50mA, VOUT = 1.2V
15
mV
Dropout Voltage
ILOAD = 50mA
0.3
V
VFB
LDO Feedback Voltage
ILOAD = 0mA
●
0.582
0.6
0.618
V
LDO2
IS
Additional DC Bias for LDO2
23
30
A
VOUT
Regulated Output Voltage
2.5V < VIN < 5.5V, 1mA < ILOAD < 50mA
0.582
VCC2 –V
0.3
Line Regulation
VCC2 = 2.5V to 5.5V, ILOAD = 1mA, VOUT = 1.2V
1
5
mV
Load Regulation
VCC2 = 2.5V, ILOAD = 1mA to 50mA, VOUT = 1.2V
15
mV
Dropout Voltage
ILOAD = 50mA
0.3
V
VFB
LDO Feedback Voltage
ILOAD = 0mA
●
0.582
0.6
0.618
V
PowerPath Controller
VTRACK
Tracked Input Voltage
3VCC1 –V
0.2
VTRACK –
Tracked Output Voltage at VCC BATT
3V < VTRACK < VCC1 – 0.2V
–0.2
0
0.2
V
VCC BATT
VBACKUP
Backup Battery Voltage
2
5.5
V
IBACKUP
Backup Battery Bias Current
VCC1 = VTRACK = 0V, VBACKUP = 2.5V
4
6.5
A
VCC BATT
VCC BATT Output
VTRACK = 0V, VCC1 = 4V, IVCCBAT = 8mA
2.85
3
3.1
V
IVCCBATT
Max VCC BATT Output Current
VCC1 = 2.5V
8
mA
BATTFAULT VCC1 High Level (Good)
Where BATTFAULT Goes High
2.65
2.8
2.9
V
VCC1 Low Level (Bad)
Where BATTFAULT Goes Low
2.4
2.5
2.6
V
Hysteresis
VCC1 = 0V to 4.2V, 4.2 to 0V
0.3
V
I2C Interface
fI2C(MAX)
Maximum I2C Operating Frequency
(Note 5)
400
kHz
tBUF
Bus Free Time Between Stop and Start
(Note 5)
1.3
s
Condition
tHD(RSTA)
Hold Time After (Repeated)
(Note 5)
600
ns
Start Condition
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| LTC3446 | 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Monolithic Buck Regulator with Dual VLDO Regulators |
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