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参数资料
| 型号： | LTC3785EUF-1#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM VM 24-QFN |
| 标准包装： | 91 |
| PWM 型： | 电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 1MHz |
| 占空比： | 99% |
| 电源电压： | 2.7 V ~ 10 V |
| 降压： | 是 |
| 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 ~ 85°C |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 包装： | 管件 |
LTC3785-1
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage (V IN ) ......................... –0.3V to 11V
I SVOUT , I SVIN .............................................. –0.3V to 11V
SW1, SW2, I SSW1 , I SSW2 Voltage:
PIN CONFIGURATION
TOP VIEW
24 23 22 21 20 19
DC............................................................. –1V to 11V
RUN/SS 1
18 I SSW1
Pulsed, <1μs ............................................. –2V to 12V
RUN/SS, MODE, CCM, V DRV , V CC Voltages .. –0.3V to 6V
PGOOD Voltage ............................................ –0.3V to 6V
V BST1 Voltage ............................................. –0.3V to 16V
V C 2
FB 3
V SENSE 4
I LSET 5
CCM 6
25
17 BG1
16 V DRV
15 BG2
14 I SSW2
13 SW2
With Respect to SW1 ............................... –0.3V to 6V
7
8
9 10 11 12
V BST2 Voltage ............................................. –0.3V to 16V
With Respect to SW2 ............................... –0.3V to 6V
Peak Driver Output Current < 10μs
(TG1, TG2, BG1, BG2).................................................3A
V CC Average Output Current.................................100mA
Operating Temperature Range (Note 2).... –40°C to 85°C
Junction Temperature ........................................... 125°C
Storage Temperature Range................... –65°C to 125°C
ORDER INFORMATION
UF PACKAGE
24-LEAD (4mm 4mm) PLASTIC QFN
T JMAX = 125°C, θ JA = 37°C/W 4 LAYER BOARD
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
LEAD FREE FINISH
LTC3785EUF-1#PBF
TAPE AND REEL
LTC3785EUF-1#TRPBF
PART MARKING
37851
PACKAGE DESCRIPTION
24-Lead (4mm × 4mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 85°C
Consult LTC Marketing for parts speci?ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based ?nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel speci?cations, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The l denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. V IN = I SVOUT = V DRV = V BST1 = V BST2 = 3.6V, R T = 49.9k, R ILSET = 59k.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V IN Supply
Input Operating Voltage
Quiescent Current—Burst Mode Operation
Quiescent Current—Shutdown
Quiescent Current—Active
V C = 0V, MODE = 3.6V (Note 4)
RUN/SS = 0V, I SVOUT = 3.6V
MODE = 0V (Note 4)
l
2.7
86
15
0.8
10
200
25
1.5
V
μA
μA
mA
Error Amp
Feedback Voltage
(Note 5)
l
1.200
1.225
1.25
V
Feedback Input Current
Error Amp Source Current
Error Amp Sink Current
Error Amp A VOL
1
–500
900
90
500
nA
μA
μA
dB
37851fa
2
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