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参数资料
| 型号： | LTC3772EDDB#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 8-DFN |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 650kHz |
| 占空比： | 100% |
| 电源电压： | 2.75 V ~ 9.8 V |
| 降压： | 是 |
| 升压： | 无 |
| 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： | 8-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
LTC3772
ELECTRICAL CHARACTERISTICS
The ● indicates specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25 ° C. V IN = 4.2V unless otherwise noted. (Note 2)
PARAMETER
V FB Input Current
Overvoltage Protect Threshold
CONDITIONS
(Note 5)
Measured at V FB
MIN
–10
0.850
TYP
2
0.880
MAX
10
0.910
UNITS
nA
V
Overvoltage Protect Hysteresis
Oscillator Frequency
40
mV
Normal Operation
Output Short Circuit
Gate Drive Rise Time
Gate Drive Fall Time
V FB = 0.8V
V FB = 0V
C LOAD = 3000pF
C LOAD = 3000pF
500
550
200
40
40
650
kHz
kHz
ns
ns
Peak Current Sense Voltage
I PRG = GND (Note 6)
I PRG = Floating
I PRG = V IN
●
●
●
90
160
228
105
175
245
120
190
262
mV
mV
mV
Default Soft-Start Time
0.6
ms
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3772ETS8/LTC3772EDDB are guaranteed to meet
specifications from 0 ° C to 70 ° C. Specifications over the –40 ° C to 85 ° C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: T J is calculated from the ambient temperature T A and power
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5: The LTC3772 are tested in a feedback loop that servos V FB to the
output of the error amplifier while maintaining I TH /RUN at the midpoint of
the current limit range.
Note 6: Peak current sense voltage is reduced dependent on duty cycle as
given in Figure 1.
dissipation P D according to the following formula:
T J = T A + (P D ? θ JA ° C/W)
TYPICAL PERFOR A CE CHARACTERISTICS
60
55
Quiescent Current (No Load)
vs Input Voltage
55
50
Quiescent Current (No Load)
vs Temperature
25
20
Quiescent Current (Shutdown)
vs Input Voltage
50
45
45
15
40
40
35
30
25
35
30
25
10
5
20
2
3
4
5
6
7
8
9
10
20
–60 –40 –20
0
20
40
60
80
100
0
2
3
4
5
6
7
8
9
10
INPUT VOLTAGE (V)
3772 G01
TEMPERATURE ( ° C)
3772 G02
INPUT VOLTAGE (V)
3772 G03
3772f
3
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3772ETS8 | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Step Down 2.75V to 9.8V Input 8-Pin TSOT-23 |
| LTC3772ETS8#PBF | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Step Down 2.75V to 9.8V Input 8-Pin TSOT-23 |
| LTC3772ETS8#TR | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Step Down 2.75V to 9.8V Input 8-Pin TSOT-23 T/R |
| LTC3772ETS8#TRM | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Step Down 2.75V to 9.8V Input 8-Pin TSOT-23 T/R |
| LTC3772ETS8#TRMPBF | 功能描述:IC REG CTRLR BUCK PWM TSOT23-8 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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