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參數(shù)資料
| 型號(hào)： | LTC3445EUF#TRPBF |
| 廠(chǎng)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)： | 19/24頁(yè) |
| 文件大?。?/td> | 470K |
| 代理商： | LTC3445EUF#TRPBF |
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4
LTC3445
3445fa
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3445EUF is guaranteed to meet performance specifica-
tions from 0
°C to 70°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
ELECTRICAL CHARACTERISTICS
Note 3: TJ is calculated from the ambient temperature, TA, and power
dissipation, PD, according to the following formula:
TJ = TA + PD 37°C/W
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5: Determined by design, not production tested.
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
tSU(RSTA)
Repeated Start Condition Setup Time
(Note 5)
600
ns
tSU(STOP)
Stop Condition Setup Time
(Note 5)
600
ns
tHD(DIN)
Data Hold Time, Input
(Note 5)
0
ns
tSU(DAT)
Data Setup Time
(Note 5)
100
ns
VTHR
SCL and SDA Logic Input Threshold
1.8
V
VHYS
SCL and SDA Logic Input Hysteresis
(Note 5)
50
mV
ILVTRACK
VTRACK Leakage
VCC = 3.6V
1.44
2.2
A
ILVBACKUP
VBACKUP Leakage
VCC = 3.6V
●
1
A
ILADD7
ADD7 Leakage
VCC = 3.6V
●
1
A
ILADD6
ADD6 Leakage
VCC = 3.6V
●
1
A
ILSCL
SCL Leakage
VCC = 3.6V
●
1
A
ILSDA
SCL Leakage
VCC = 3.6V
●
1
A
ILLDO1
LDO1 Leakage
VCC = 3.6V, RUN = 0
●
1
A
ILLDO2
LDO2 Leakage
VCC = 3.6V, RUN = 0
●
1
A
ILLDO1FB
LDO1FB Leakage
VCC = 3.6V, RUN = 0
●
1
A
ILLDO2FB
LDO2FB Leakage
VCC = 3.6V, RUN = 0
●
1
A
ILBATTFAULT BATTFAULT Leakage
VCC = 3.6V
●
1
A
IFB1,2
LDO Feedback Input Current
VFB1 = 0.6V
●
1
A
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Supply Current vs Supply Voltage
SUPPLY VOLTAGE (V)
2.4
SUPPLY
CURRENT
(
A)
300
400
500
3.6
4.4
5.6
3445 G01
200
100
0
2.8
3.2
4
4.8
5.2
ALL ON
BUCK
TWO LDOs
RUN = HIGH
RUN = LOW
ONE LDO
VOUT vs DAC
DAC VALUE
0
V
OUT
(V)
1.2
1.4
80
3445 G02
1.0
0.8
20
40
60
10
30
50
70
1.6
1.1
1.3
0.9
1.5
0mA
600mA
DAC VALUE
0
V
OUT(N)
–
V
OUT(N–1)
(V)
0.008
0.010
0.012
80
3445 G03
0.006
0.004
–0.002
20
40
60
10
30
50
70
0.002
0
0.016
0.014
100mA
VOUT Step Size vs DAC
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