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参数资料
| 型号： | LTC3865IUH#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 880 kHz SWITCHING FREQ-MAX, PQCC32 |
| 封装： | 5 X 5 MM, LEAD FREE, PLASTIC, MO-220WHHD, QFN-32 |
| 文件页数： | 34/38页 |
| 文件大小： | 400K |
| 代理商： | LTC3865IUH#PBF |
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LTC3865/LTC3865-1
5
3865fb
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 LTC3865/LTC3865-1 are tested under pulsed load conditions
such that TJ ≈ TA. The LTC3865E/LTC3865E-1 are guaranteed to meet
performance specications over the 0°C to 85°C operating junction
temperature range. Specications over the –40°C to 125°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3865I/LTC3865I-1
are guaranteed to meet performance specications over the full –40°C
to 125°C operating junction temperature range. Note that the maximum
ambient temperature consistent with these specications is determined by
specic operating conditions in conjunction with board layout, the rated
package thermal resistance and other environmental factors.
Note 3: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formulas:
LTC3865UH: TJ = TA + (PD 34°C/W)
LTC3865FE: TJ = TA + (PD 25°C/W)
Note 4: The LTC3865/LTC3865-1 are tested in a feedback loop that servos
VITH1,2 to a specied voltage and measures the resultant VOSENSE1,2.
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).
Note 8: VSENSE(MAX) defaults to 50mV for the LTC3865-1.
Note 9: Guaranteed by design.
ELECTRICAL CHARACTERISTICS The l denotes the specications which apply over the full operating
junction temperature range, otherwise specications are at TA = 25°C (Note 2). VIN = 15V, VRUN1,2 = 5V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
BG RDOWN
BG Driver Pull-Down On-Resistance
BG Low
1.4
Ω
TG1,2 tr
TG1,2 tf
TG Transition Time:
Rise Time
Fall Time
(Note 6)
CLOAD = 3300pF
25
ns
BG1,2 tr
BG1,2 tf
BG Transition Time:
Rise Time
Fall Time
(Note 6)
CLOAD = 3300pF
25
ns
TG/BG t1D
Top Gate Off to Bottom Gate On Delay
Synchronous Switch-On Delay Time
CLOAD = 3300pF Each Driver
30
ns
BG/TG t2D
Bottom Gate Off to Top Gate On Delay
Top Switch-On Delay Time
CLOAD = 3300pF Each Driver
30
ns
tON(MIN)
Minimum On-Time
(Note 7)
90
ns
INTVCC Linear Regulator
VINTVCC
Internal VCC Voltage
6V < VIN < 38V
4.8
5.0
5.2
V
VLDO INT
INTVCC Load Regulation
ICC = 0mA to 20mA
0.5
2
%
VEXTVCC
EXTVCC Switchover Voltage
EXTVCC Ramping Positive
l
4.5
4.7
V
VLDO EXT
EXTVCC Voltage Drop
ICC = 20mA, VEXTVCC = 5V
50
100
mV
VLDOHYS
EXTVCC Hysteresis
200
mV
Oscillator and Phase-Locked Loop
fNOM
Nominal Frequency
RFREQ = 162k
450
500
550
kHz
fLOW
Lowest Frequency
RFREQ = 0Ω
210
250
290
kHz
fHIGH
Highest Frequency
RFREQ ≥ 325k
650
770
880
kHz
RMODE/PLLIN MODE/PLLIN Input Resistance
250
kΩ
IFREQ
Frequency Setting Current
VFREQ = 1.22V
6.5
7.5
8.5
μA
PGOOD OUTPUT
VPGL
PGOOD Voltage Low
IPGOOD = 2mA
0.1
0.3
V
IPGOOD
PGOOD Leakage Current
VPGOOD = 5V
±2
μA
VPG
PGOOD Trip Level
VOSENSE with Respect to Set Regulated Voltage
VID11 = VID12 = VID21 = VID22 = Float
VOSENSE Ramping Negative
VOSENSE Ramping Postitive
–7
7
–10
10
–12.5
12.5
%
tPG
PGOOD Bad Blanking Time
Measured from VID Transitition Edge
100
μs
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| LTC3866EFE#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 24TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,000 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:50% 电源电压:9 V ~ 10 V 降压:无 升压:是 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:8-TSSOP（0.173"，4.40mm 宽） 包装:带卷 (TR) |
| LTC3866EFE#PBF | 制造商:Linear Technology 功能描述:BUCK REGULATOR CURRENT MODE SYNC TSSOP |
| LTC3866EFE#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 24TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
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