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參數(shù)資料
| 型號： | LT1956-5IGN |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 570 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SSOP-16 |
| 文件頁數(shù)： | 18/24頁 |
| 文件大?。?/td> | 437K |
| 代理商： | LT1956-5IGN |
3
LT1956/LT1956-5
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Input Voltage
(Note 3)
q
4.6
5.5
V
Minimum Boost Voltage
(Note 4) ISW ≤ 1.5A
q
23
V
Boost Current (Note 5)
Boost = VIN + 5V, ISW = 0.5A
q
12
25
mA
Boost = VIN + 5V, ISW = 1.5A
q
42
70
mA
Input Supply Current (IVIN)
(Note 6) VBIAS = 5V
1.4
2.2
mA
Output Supply Current (IBIAS)
(Note 6) VBIAS = 5V
2.9
4.2
mA
Shutdown Supply Current
SHDN = 0V, VIN ≤ 60V, SW = 0V, VC Open
25
75
A
q
200
A
Lockout Threshold
VC Open
q
2.3
2.38
2.46
V
Shutdown Thresholds (LT1956 Only)
VC Open, Shutting Down
q
0.15
0.37
0.6
V
VC Open, Starting Up
q
0.25
0.45
0.6
V
Minimum SYNC Amplitude
q
1.5
2.2
V
SYNC Frequency Range
580
700
kHz
SYNC Input Resistance
20
k
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C.
VIN = 15V, VC = 1.5V, SHDN = 1V, Boost o/c, SW o/c, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
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 VC swing equal to 200mV above the low
clamp 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 remain constant.
Actual minimum input voltage to maintain a regulated output will depend
upon 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: Input supply current is the quiescent current drawn by the input
pin when the BIAS pin is held at 5V with switching disabled. Bias supply
current is the current drawn by the BIAS pin when the BIAS pin is held at
5V. Total input referred supply current is calculated by summing input
supply current (IVIN) with a fraction of supply current (IBIAS):
ITOTAL = IVIN + (IBIAS)(VOUT/VIN)
With VIN = 15V, VOUT = 5V, IVIN = 1.4mA, IBIAS = 2.9mA, ITOTAL = 2.4mA.
Note 7: Switch on resistance is calculated by dividing VIN to SW voltage by
the forced current (1.5A). See Typical Performance Characteristics for the
graph of switch voltage at other currents.
Note 8: The LT1956EGN/LT1956-5EGN 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 LT1956IGN/LT1956-5IGN are guaranteed
and tested over the full – 40
°C to 125°C operating junction temperature
range.
Note 9: 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 fixed voltage parts. Divide values shown by the
ratio VOUT/1.219.
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| LT1956EFE#PBF | 功能描述:IC REG BUCK ADJ 1.5A 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(biāo)準(zhǔn)包裝:250 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 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關(guān):2MHz 電流 - 輸出:500mA 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:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LT1956EFE#TR | 功能描述:IC REG BUCK ADJ 1.5A 16TSSOP RoHS:否 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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