參數(shù)資料
型號(hào)： LTC3701EGN
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 2-Phase, Low Input Voltage, Dual Step-Down DC/DC Controller
中文描述： 1 A DUAL SWITCHING CONTROLLER, 890 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 0.150 INCH, PLASTIC, SSOP-16
文件頁數(shù)： 3/20頁
文件大?。?/td> 250K
代理商： LTC3701EGN
3
LTC3701
3701fa
The
G
denotes specifications which apply over the full operating
temperature range, otherwise specifications are T
A
= 25
°
C. V
IN
= 4.2V unless otherwise noted.
PARAMETER
Oscillator and Phase-Locked Loop
Oscillator Frequency
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
TYP
MAX
UNITS
V
PLLLPF
= 1.2V or Floating
V
PLLLPF
= 0V
V
PLLLPF
≥
2.4V
500
230
690
550
280
775
600
320
890
kHz
kHz
kHz
Phase Detector Output Current
Sinking
Sourcing
PGOOD Output
PGOOD Voltage Low
PGOOD Trip Level
f
EXTCLK/MODE
< f
OSC
f
EXTCLK/MODE
> f
OSC
–5
5
μ
A
μ
A
I
PGOOD
= 500
μ
A
V
FB
with Respect to Set Output Voltage
V
FB
Ramping Positive
V
FB
Ramping Negative
70
150
mV
–15
2.5
–8
8
–2.5
15
%
%
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LTC3701E is guaranteed to meet performance specifications
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.
Note 3:
TJ is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formula:
T
J
= T
A
+ (P
D
θ
JA
°
C/W)
Note 4:
Dynamic supply current is higher due to gate charge being
delivered at the switching frequency.
Note 5:
The LTC3701 is tested in a feedback loop that servos I
TH/RUN
to a
specified voltage and measures the resultant V
FB
voltage.
Note 6:
Peak current sense voltage is reduced dependent on duty cycle to
a percentage of value as given in Figure 2.
TYPICAL PERFOR U
Reference Voltage vs Temperature
TEMPERATURE (
°
C)
–60
R
0.795
0.800
0.805
60
3701 G01
0.790
0.785
–20
20
–40
80
0
40
100
0.780
0.775
0.810
V
IN
= 4.2V
TEMPERATURE (
°
C)
–60
I
T
/
0.38
0.36
0.34
0.44
0.42
0.40
0.50
0.48
0.46
0
40
100
3701 G02
0.32
0.30
0.28
0.26
0.24
0.22
0.20
–40 –20
20
60
80
V
IN
= 4.2V
TEMPERATURE (
°
C)
–60
0
F
100
300
400
500
1000
700
–20
20
40
3701 G03
200
800
900
600
–40
0
60
80
100
V
IN
= 4.2V
PLLLPF = 2.4V
PLLLPF = 0V
PLLLPF = FLOAT
Shutdown Threshold
vs Temperature
Oscillator Frequency
vs Temperature
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