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| 型号： | LTC3722IGN-2#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/28页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR DIV ISO PWM 24SSOP |
| 标准包装： | 55 |
| PWM 型： | 电压模式，全桥 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 占空比： | 98.5% |
| 电源电压： | 3.8 V ~ 10.3 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 是 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 24-SSOP（0.154"，3.90mm 宽） |
| 包装： | 管件 |
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LTC3722-1/LTC3722-2
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T A = 25°C. V CC = 9.5V, C T = 270pF, R DPRG = 60.4k, R SPRG = 100k, unless
otherwis e noted (Note 6).
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reference
V REF
REFLD
REFLN
Initial Accuracy
Load Regulation
Line Regulation
T A = 25°C, Measured on V REF
Load on V REF = 100μA to 5mA
V CC = 6.5V to 9.5V
4.925
5.00
2
0.9
5.075
15
10
V
mV
mV
REFTV
REFSC
Total Variation
Short-Circuit Current
Line, Load
V REF Shorted to GND
l
4.900
18
5.000
30
5.100
45
V
mA
Outputs
OUTH(x)
Output High Voltage
I OUT(x) = –50mA
7.9
8.4
V
OUTL(x)
R HI(x)
R LO(x)
t r(x)
t f(x)
SDEL
Output Low Voltage
Pull-Up Resistance
Pull-Down Resistance
Rise Time
Fall Time
SYNC Driver Turn-0ff Delay
I OUT(x) = 50mA
I OUT(x) = –50mA to –10mA
I OUT(x) = –50mA to –10mA
C OUT(x) = 50pF (Note 8)
C OUT(x) = 50pF (Note 8)
R SPRG = 100k
0.6
22
12
5
5
180
1
30
20
15
15
V
Ω
Ω
ns
ns
ns
Current Limit and Shutdown
CLPP
CLSD
CLDEL
SSI
SSR
FLT
Pulse by Pulse Current Limit Threshold
Shutdown Current Limit Threshold
Current Limit Delay to Output
Soft-Start Current
Soft-Start Reset Threshold
Fault Reset Threshold
Measured on CS
LTC3722E-1/LTC3722I-1/LTC3722E-2/LTC3722I-2
LTC3722H-1
Measured on CS
100mV Overdrive on CS (Notes 3, 7)
SS = 2.5V
Measured on SS
Measured on SS
270
270
0.55
7
0.7
4.5
300
300
0.65
80
12
0.4
3.9
330
340
0.73
17
0.1
3.5
mV
mV
V
ns
μA
V
V
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: Sync amplitude = 5V P-P , pulse width = 50ns. Verify output (A-F)
frequency = one-half sync frequency.
Note 3: Includes leading edge blanking delay, R LEB = 20k.
Note 4: FB is driven by a servo-loop amplifier to control V COMP for these
tests.
Note 5: Set FB to –0.3V, 2.5V and insure that COMP does not phase invert.
Note 6: The LTC3722 is tested under pulsed load condition such that
T J ≈ T A . The LTC3722E-1/LTC3722E-2 are guaranteed to meet performance
specifications from 0°C to 85°C. Specifications over the –40°C to
85°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3722I-1/LTC3722I-2 are guaranteed over the –40°C to 85°C operating
junction temperature range and the LTC3722H-1 is guaranteed over the
–40°C to 150°C operating junction temperature range.
High junction temperatures degrade operating lifetimes; operating lifetime
is derated for junction temperatures greater than 125°C. 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.
Note 7: Guaranteed by design, not tested in production.
Note 8: Rise time is measured from the 10% to 90% points of the rising
edge of the driver output signal. Fall time is measured from the 90% to
10% points of the falling edge of the driver output signal.
372212fb
4
For more information www.linear.com/LTC3722
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