參數(shù)資料
型號(hào)： LTC3850EUF#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 0.1 A DUAL SWITCHING CONTROLLER, 860 kHz SWITCHING FREQ-MAX, PQCC28
封裝： 4 X 4 MM, PLASTIC, QFN-28
文件頁(yè)數(shù)： 27/32頁(yè)
文件大?。?/td> 474K
代理商： LTC3850EUF#TR
LTC3850
4
3850f
INPUT VOLTAGE (V)
5
80
EFFICIENCY
(%)
POWER
LOSS
(mW)
90
100
95
10
15
85
0
1000
2000
500
1500
20
25
3850 G03
POWER LOSS
EFFICIENCY
CIRCUIT OF FIGURE 12
VOUT = 3.3V
IOUT = 2A
LOAD CURRENT (mA)
CIRCUIT OF FIGURE 12
10
40
EFFICIENCY
(%)
50
60
70
80
100
1000
10000
30
20
10
0
90
100
3850 G01
BURST
DCM
CCM
VIN = 12V
VOUT = 1.8V
LOAD CURRENT (mA)
10
40
EFFICIENCY
(%)
50
60
70
80
100
1000
10000
30
20
10
0
90
100
3850 G02
BURST
DCM
CCM
CIRCUIT OF FIGURE 12
VIN = 12V
VOUT = 3.3V
Efciency vs Output Current
and Mode
Efciency and Power Loss
vs Input Voltage
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3850E is guaranteed to meet performance specications
from 0°C to 85°C. Specications 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 TA and power
dissipation PD according to the following formulas:
LTC3850EGN: TJ = TA + (PD 95°C/W)
LTC3850EUF: TJ = TA + (PD 37°C/W)
The ● denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C, VIN = 15V, VRUN1,2 = 5V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VLDOHYS
EXTVCC Hysteresis
200
mV
Oscillator and Phase-Locked Loop
fNOM
Nominal Frequency
VFREQ = 1.2V
450
500
550
kHz
fLOW
Lowest Frequency
VFREQ = 0V
210
250
290
kHz
fHIGH
Highest Frequency
VFREQ ≥ 2.4V
700
780
860
kHz
RMODE/PLLIN
MODE/PLLIN Input Resistance
250
kΩ
IFREQ
Phase Detector Output Current
Sinking Capability
Sourcing Capability
fMODE < fOSC
fMODE > fOSC
–13
13
A
PGOOD Output
VPGL
PGOOD Voltage Low
IPGOOD = 2mA
0.1
0.3
V
IPGOOD
PGOOD Leakage Current
VPGOOD = 5V
±2
A
VPG
PGOOD Trip Level
VFB with Respect to Set Regulated Voltage
VFB Ramping Negative
VFB Ramping Positive
–5
5
– 7.5
7.5
–10
10
%
Note 4: The LTC3850 is tested in a feedback loop that servos VITH1,2 to a
specied voltage and measures the resultant VFB1,2.
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 6: Rise and fall times are measured using 10% and 90% levels. Delay
times are measured using 50% levels.
Note 7: The minimum on-time condition is specied for an inductor
peak-to-peak ripple current ≥40% of IMAX (see Minimum On-Time
Considerations in the Applications Information section).
TYPICAL APPLICATION
Efciency vs Output Current
and Mode
相關(guān)PDF資料
PDF描述
LTC3851AHMSE#PBF SWITCHING REGULATOR, PDSO16
LTC3851AMPMSE#PBF SWITCHING REGULATOR, PDSO16
LTC3851AIGN#TRPBF SWITCHING REGULATOR, PDSO16
LTC3851AHMSE#TRPBF SWITCHING REGULATOR, PDSO16
LTC3851AIMSE#PBF SWITCHING REGULATOR, PDSO16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3850IGN#PBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤(pán) 包裝:Digi-Reel® 產(chǎn)品目錄頁(yè)面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR
LTC3850IGN#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無(wú) 升壓:是 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤(pán) 包裝:帶卷 (TR)
LTC3850IGN-1#PBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無(wú) 升壓:是 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤(pán) 包裝:帶卷 (TR)
LTC3850IGN-1#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無(wú) 升壓:是 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤(pán) 包裝:帶卷 (TR)
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