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參數(shù)資料
| 型號： | LT3437IFE |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | MOSFET N-CHANNEL 100V SOT323 |
| 中文描述： | 0.9 A SWITCHING REGULATOR, 240 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 4.40 MM, PLASTIC, TSSOP-16 |
| 文件頁數(shù)： | 3/24頁 |
| 文件大小： | 523K |
| 代理商： | LT3437IFE |
LT3437
3
3437f
Note 1:
Absolute Maximum Ratings are those values beyond which the life of
a device may be impaired.
Note 2:
The LT3437EDD/LT3437EFE are guaranteed to meet performance
specifications from 0
°
C to 125
°
C junction temperature. Specifications over
the –40
°
C to 125
°
C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls. The
LT3437IDD/LT3437IFE are guaranteed and tested over the full –40
°
C to
125
°
C operating junction temperature range.
Note 3:
Minimum input voltage is defined as the voltage where switching
starts. Actual minimum input voltage to maintain a regulated output will
depend upon output voltage and load current. See Applications Information.
Note 4:
Supply input current is the quiescent current drawn by the input
pin. Its typical value depends on the voltage on the BIAS pin and operating
state of the LT3437. With the BIAS pin at 0V, all of the quiescent current
required to operate the LT3437 will be provided by the V
IN
pin. With the
BIAS voltage above its minimum input voltage, a portion of the total
quiescent current will be supplied by the BIAS pin. Supply sleep current is
defined as the quiescent current during the “sleep” portion of Burst Mode
operation. See Applications Information for determining application supply
currents.
Note 5:
Minimum BIAS voltage is the voltage on the BIAS pin when I
BIAS
is
sourced into the pin.
Note 6:
This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the internal power switch.
Note 7:
Boost current is the current flowing into the BOOST pin with the pin
held 3.3V above input voltage. It flows only during switch on time.
Note 8:
Gain is measured with a V
C
swing from 1.15V to 750mV.
Note 9:
Switch saturation voltage guaranteed by correlation to wafer level
measurements for DD package parts.
Note 10:
The C
SS
threshold is defined as the value of current sourced into the
C
SS
pin which results in an increase in sink current from the V
C
pin. See the
Soft-Start section in Applications Information.
SYMBOL
I
BIASS
I
BIAS
PARAMETER
BIAS Sleep Current (Note 4)
BIAS Quiescent Current
Minimum Boost Voltage (Note 6)
Input Boost Current (Note 7)
CONDITIONS
MIN
TYP
150
0.75
1.8
11
8
1.25
50
900
650
35
30
1
500
1.75
650
200
400
200
95
1.5
MAX
250
1
2.5
16
13
1.275
200
UNITS
●
μ
A
mA
SYNC = 2V
I
SW
= 250mA
I
SW
= 0.5A
I
SW
= 0.25A
3.3V < V
VIN
< 80V
V
mA
mA
V
REF
I
FB
Reference Voltage (V
REF
)
FB Input Bias Current
EA Voltage Gain (Note 8)
EA Voltage g
m
EA Source Current
EA Sink Current
V
C
to SW g
m
V
C
Switching Threshold
V
C
High Clamp
SW Current Limit
Switch Saturation Voltage
(Note 9)
Switching Frequency
Maximum Duty Cycle
Minimum SYNC Amplitude
SYNC Frequency Range
SYNC Input Impedance
C
SS
Current Threshold (Note 10)
●
1.225
V
nA
V/V
dI(V
C
)=
±
10
μ
A
FB = 1.15V
FB = 1.35V
μ
Mho
15
15
55
55
μ
A
μ
A
A/V
mV
V
SYNC
= 2V
1.5
500
2.1
900
400
800
240
V
I
PK
SW V
CESAT
●
mA
mV
mV
kHz
%
I
SW
= 250mA
I
SW
= 500mA
●
●
●
170
2
V
240
700
kHz
k
μ
A
50
10
I
CSS
FB = 0V
4
16
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
J
= 25
°
C. V
IN
= 12V, SHDN = 12V, BIAS = 5V, FB = 1.25V,
C
SS
/SYNC = 0V unless otherwise noted.
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| LT3437IFE#PBF | 功能描述:IC REG BUCK ADJ 0.5A 16TSSOP 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:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
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