參數(shù)資料
型號(hào)： LT1374CS8-5
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： ADAPTERS, COAX; SC MALE TO SC FEMALE RIGHT ANGLE COAXIAL ADAPTER
中文描述： 8.5 A SWITCHING REGULATOR, 560 kHz SWITCHING FREQ-MAX, PDSO8
封裝： 0.150 INCH, PLASTIC, SO-8
文件頁(yè)數(shù)： 3/28頁(yè)
文件大小： 261K
代理商： LT1374CS8-5
3
LT1374
PARAMETER
Feedback Input Bias Current
Error Amplifier Voltage Gain
Error Amplifier Transconductance
CONDITIONS
MIN
TYP
0.5
400
2000
MAX
2
UNITS
G
μ
A
(Notes 2, 8)
I (V
C
) =
±
10
μ
A (Note 8)
200
1500
1000
2700
3100
μ
Mho
μ
Mho
A/V
G
V
C
Pin to Switch Current Transconductance
Error Amplifier Source Current
Error Amplifier Sink Current
V
C
Pin Switching Threshold
V
C
Pin High Clamp
Switch Current Limit
Slope Compensation (Note 9)
Switch On Resistance (Note 7)
5.3
225
225
0.9
2.1
6
0.8
0.07
V
FB
= 2.1V or V
SENSE
= 4.4V
V
FB
= 2.7V or V
SENSE
= 5.6V
Duty Cycle = 0
G
140
140
320
320
μ
A
μ
A
V
V
A
A
%
%
kHz
kHz
%/V
G
V
C
Open, V
FB
= 2.1V or V
SENSE
= 4.4V, DC
≤
50%
DC = 80%
I
SW
= 4.5A
G
4.5
8.5
0.1
0.13
G
Maximum Switch Duty Cycle
V
FB
= 2.1V or V
SENSE
= 4.4V
90
86
460
440
93
93
500
G
Switch Frequency
V
C
Set to Give 50% Duty Cycle
540
560
0.15
1.3
5.5
3.0
35
140
1.4
4.0
50
75
75
100
2.46
0.60
0.7
2.2
1000
G
Switch Frequency Line Regulation
Frequency Shifting Threshold on FB Pin
Minimum Input Voltage (Note 3)
Minimum Boost Voltage (Note 4)
Boost Current (Note 5)
5V
≤
V
IN
≤
25V, (5V
≤
V
IN
≤
32V for LT1374HV)
f = 10kHz
G
0
G
0.8
1.0
5.0
2.3
20
90
0.9
3.2
20
V
V
V
G
I
SW
≤
4.5A
I
SW
= 1A
I
SW
= 4.5A
V
BIAS
= 5V
V
BIAS
= 5V
V
SHDN
= 0V, V
IN
≤
25V, V
SW
= 0V, V
C
Open
G
G
G
mA
mA
mA
mA
μ
A
μ
A
μ
A
μ
A
V
IN
Supply Current (Note 6)
BIAS Supply Current (Note 6)
Shutdown Supply Current
G
G
G
V
SHDN
= 0V, V
IN
≤
32V, V
SW
= 0V, V
C
Open
30
G
Lockout Threshold
Shutdown Thresholds
V
C
Open
V
C
Open Device Shutting Down
Device Starting Up
G
2.3
0.13
0.25
2.38
0.37
0.45
1.5
V
V
V
V
G
G
Synchronization Threshold
Synchronizing Range
SYNC Pin Input Resistance
G
580
kHz
k
40
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
Gain is measured with a V
C
swing equal to 200mV above the
switching threshold level to 200mV below the upper clamp level.
Note 3:
Minimum input voltage is not measured directly, but is guaranteed
by other tests. It is defined as the voltage where internal bias lines are still
regulated so that the reference voltage and oscillator frequency remain
constant. Actual minimum input voltage to maintain a regulated output will
depend on output voltage and load current. See Applications Information.
Note 4:
This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the internal power switch.
Note 5:
Boost current is the current flowing into the boost pin with the pin
held 5V above input voltage. It flows only during switch on time.
Note 6:
V
IN
supply current is the current drawn when the BIAS pin is held
at 5V and switching is disabled. If the BIAS pin is unavailable or open
circuit, the sum of V
IN
and BIAS supply currents will be drawn by the V
IN
pin.
Note 7:
Switch on resistance is calculated by dividing V
IN
to V
SW
voltage
by the forced current (4.5A). See Typical Performance Characteristics for
the graph of switch voltage at other currents.
Note 8:
Transconductance and voltage gain refer to the internal amplifier
exclusive of the voltage divider. To calculate gain and transconductance,
refer to the SENSE pin on the fixed voltage parts. Divide values shown by
the ratio V
OUT
/2.42.
Note 9:
Slope compensation is the current subtracted from the switch
current limit at 80% duty cycle. See Maximum Output Load Current in the
Applications Information section for further details.
The
G
denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at T
J
= 25
°
C. V
IN
= 15V, V
C
= 1.5V, Boost = V
IN
+ 5V, switch open, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
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LT1374CS8-5#TRPBF 功能描述:IC REG BUCK 5V 4.5A 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT
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