參數(shù)資料
型號(hào): LTC1434CGN
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: 14-bit, 5V, 200KSPS, 8-Channel Unipolar ADC 24-SOIC -40 to 85
中文描述: 1.2 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO20
封裝: 0.150 INCH, PLASTIC, SSOP-20
文件頁數(shù): 3/20頁
文件大小: 379K
代理商: LTC1434CGN
3
LTC1433/LTC1434
ELECTRICAL CHARACTERISTICS
T
A
= 25
°
C, V
IN
= 10V, V
RUN/SS
= 5V, unless otherwise noted.
The
G
denotes specifications which apply over the specified temperature
range.
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
C-grade device specifications are guaranteed over the 0
°
C to 70
°
C
temperature range. In addition, C-grade device specifications are assured
over the –40
°
C to 85
°
C temperature range by design or correlation, but
are not production tested.
Note 3:
I-grade device specifications are guaranteed over the –40
°
C to
85
°
C temperature range by design, testing or correlation.
Note 4:
T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formula:
LTC1433/LTC1434: T
J
= T
A
+ (P
D
)(150
°
C/W)
Note 5:
The LTC1433/LTC1434 are tested in a feedback loop which servos
V
OSENSE
to the feedback point for the error amplifier (V
ITH
= 1.19V).
Note 6:
Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 7:
Oscillator frequency is tested by measuring the C
OSC
charge and
discharge currents and applying the formula:
8.4(10
8
)
C
OSC
(pF) + 11
I
CHG
f
OSC
(kHz) =
+
–1
(
)
1
(
)
1
I
DIS
SYMBOL
I
PROG
PARAMETER
V
PROG
Input Current
CONDITIONS
0.5V > V
PROG
V
IN
– 0.5V < V
PROG
< V
IN
MIN
TYP
–4
4
MAX
–10
10
UNITS
μ
A
μ
A
Main Control Loop
I
Q
Input DC Supply Current
Normal Mode
Shutdown, Reference Alive
Complete Shutdown
RUN/SS Threshold
Soft Start Current Source
(Note 6)
3.6V < V
IN
< 13V
V
RUN/SS
= 0V, 3.6V < V
IN
< 13V, LBI > 0.9V
V
RUN/SS
= 0V, 3.6V < V
IN
< 13V, LBI
0.48V
470
35
15
1.3
3
μ
A
μ
A
μ
A
V
μ
A
70
30
2
4.5
V
RUN/SS
I
RUN/SS
Oscillator and Phase-Locked Loop
f
OSC
Oscillator Frequency
V
CO
High
R
PLLIN
PLL Input Resistance
I
PLL LPF
Phase Detector Output Current
Sinking Capability
Sourcing Capability
Power-On Reset
V
SATPOR
POR Saturation Voltage
I
LPOR
POR Leakage
V
TRPOR
POR Trip Voltage from Regulated
Output
t
DPOR
POR Delay
Low-Battery Comparator
V
SATLBO
LBO Saturation Voltage
I
LLBO
LBO Leakage
V
TRLBI
LBI Trip Voltage
V
HYSTLB
Low-Battery Comparator Hysteresis
V
SDLB
Low-Battery Shutdown Trip Point
I
INLBI
LBI Input Current
P-Channel Power FETs Characteristics
R
SMFET
R
DS(ON)
of Small FET
R
BIGFET
R
DS(ON)
of Big FET
I
LSSW
Small FET Leakage
I
LBSW
Big FET Leakage
G
0.8
1.2
V
RUN/SS
= 0V
C
OSC
= 100pF (Note 7)
V
PLL LPF
= 2.4V
112
200
125
240
50
142
kHz
kHz
k
f
PLLIN
< f
OSC
f
PLLIN
> f
OSC
10
10
15
15
20
20
μ
A
μ
A
I
POR
= 1.6mA, V
OSENSE
= 1V, V
PROG
Open
V
POR
= 10V, V
OSENSE
= 1.2V, V
PROG
Open
V
PROG
Pin Open, V
OSENSE
Ramping Negative
0.6
0.2
–7.5
1.0
1.0
–4
V
μ
A
%
–11
V
PROG
Pin Open
65536
Cycles
I
LBO
= 1.6mA, V
LBI
= 1.1V
V
LBO
= 10V, V
LBI
= 1.4V
High to Low Transition on LBO
0.6
0.01
1.19
40
0.74
1
1.0
1.0
1.22
V
μ
A
V
mV
1.16
V
V
LBI
= 1.19V
50
nA
I
SSW
= 15mA
I
BSW
= 150mA
V
RUN/SS
= 0V
V
RUN/SS
= 0V
3.3
0.8
7
5
4.1
1.2
1000
1000
nA
nA
G
G
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