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參數(shù)資料
| 型號： | LTC3788IUH#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 900 kHz SWITCHING FREQ-MAX, PQCC32 |
| 封裝： | 5 X 5 MM, LEAD FREE, PLASTIC, MO-220WHHD, QFN-32 |
| 文件頁數(shù)： | 27/32頁 |
| 文件大?。?/td> | 386K |
| 代理商： | LTC3788IUH#PBF |
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LTC3788
4
3788fb
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
tON(MIN)
Minimum BG On-Time
(Note 7)
110
ns
INTVCC Linear Regulator
VINTVCCVIN
Internal VCC Voltage
6V < VBIAS < 38V, VEXTVCC = 0V
5.2
5.4
5.6
V
VLDOVIN
INTVCC Load Regulation
ICC = 0mA to 50mA, VEXTVCC = 0V
0.5
2
%
VINTVCCEXT
Internal VCC Voltage
VEXTVCC = 6V
5.2
5.4
5.6
V
VLDOEXT
INTVCC Load Regulation
ICC = 0mA to 40mA, VEXTVCC = 6V
0.5
2
%
VEXTVCC
EXTVCC Switchover Voltage
EXTVCC Ramping Positive
4.5
4.8
5
V
VLDOHYS
EXTVCC Hysteresis
250
mV
Oscillator and Phase-Locked Loop
fPROG
Programmable Frequency
RFREQ = 25k
105
kHz
RFREQ = 60k
335
400
465
kHz
RFREQ = 100k
760
kHz
fLOW
Lowest Fixed Frequency
VFREQ = 0V
320
350
380
kHz
fHIGH
Highest Fixed Frequency
VFREQ = INTVCC
485
535
585
kHz
fSYNC
Synchronizable Frequency
PLLIN/MODE = External Clock
l
75
850
kHz
PGOOD1 and PGOOD2 Outputs
VPGL
PGOOD Voltage Low
IPGOOD = 2mA
0.2
0.4
V
IPGOOD
PGOOD Leakage Current
VPGOOD = 5V
±1
A
VPG
PGOOD Trip Level
VFB with Respect to Set Regulated Voltage
VFB Ramping Negative
–12
–10
–8
%
Hysteresis
2.5
%
VFB Ramping Positive
8
10
12
%
Hysteresis
2.5
%
tPGOOD(DELAY)
PGOOD Delay
PGOOD Going High to Low
25
s
BOOST1 and BOOST2 Charge Pump
IBOOST1,2
BOOST Charge Pump Available
Output Current
VSW1,2 = 12V; VBOOST1,2 – VSW1,2 = 4.5V;
FREQ = 0V, Forced Continuous or
Pulse-Skipping Mode
55
A
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at TA = 25°C, VBIAS = 12V, unless otherwise noted (Note 2).
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 LTC3788 is tested under pulsed load conditions such that TJ
≈ TA. The LTC3788E is guaranteed to meet specifications from 0°C to 85°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 LTC3788I is guaranteed
over the –40°C to 125°C operating junction temperature range. Note that
the maximum ambient temperature consistent with these specifications
is determined by specific operating conditions in conjunction with board
layout, the rated package thermal impedance and other environmental
factors. The junction temperature (TJ, in °C) is calculated from the ambient
temperature (TA, in °C) and power dissipation (PD, in Watts) according to
the formula: TJ = TA + (PD θJA), where θJA = 34°C/W.
Note 3: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. The maximum
rated junction temperature will be exceeded when this protection is active.
Continuous operation above the specified absolute maximum operating
junction temperature may impair device reliability or permanently damage
the device.
Note 4: The LTC3788 is tested in a feedback loop that servos VFB to the
output of the error amplifier while maintaining ITH at the midpoint of the
current limit range.
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 6: Rise and fall times are measured using 10% and 90% levels.
Delay times are measured using 50% levels.
Note 7: See Minimum On-Time Considerations in the Applications
Information section.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
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| LTC3789EGN#PBF | 功能描述:IC REG CTRLR BST 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:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
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| LTC3789EGN#TRPBF | 功能描述:IC REG CTRLR BST 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:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
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