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| 型号： | LTC3823IGN#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/26页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 28-SSOP |
| 标准包装： | 49 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 占空比： | 90% |
| 电源电压： | 4.5 V ~ 36 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： | 28-SSOP（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 产品目录页面： | 1336 (CN2011-ZH PDF) |
LTC3823
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 = 15V unless otherwise speci?ed.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
PGOOD Output
ΔV FBH
ΔV FBL
ΔV FB(HYS)
V PGL
PGOOD Upper Threshold
PGOOD Lower Threshold
PGOOD Hysteresis
PGOOD Low Voltage
V FB Rising
V FB Falling
V FB Returning
I PGOOD = 5mA
8
–8
11
–11
1.5
0.15
14
–14
3
0.4
%
%
%
V
Differential Sensing Ampli?er
A DA
Gain
l
0.9965
1.000
1.0035
V/V
R IN
V OS
Input Resistance
Input Offset Voltage
Measured at V OUTSENSE+ Input
V OUTSENSE+ = V DIFFOUT = 1.5V,
80
2
kΩ
mV
I DIFFOUT = 1mA
PSRR OA
I CL
Power Supply Rejection Ratio
Maximum Output Current
6V < V IN < 30V
90
3
dB
mA
V OUT(MAX)
GBW
Maximum Output Voltage
Gain Bandwidth Product
I DIFFOUT = 300μA
I DIFFOUT = 1mA
l
3.775
4
3.5
V
MHz
Thermal Shutdown
T SD
T HYST
Shutdown Temperature
Thermal Hysteresis
Rising
170
15
°C
°C
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: T J is calculated from the ambient temperature T A and power
dissipation P D according to the following formulas:
LTC3823GN: T J = T A + (P D ? 80°C/W)
Note 3: The LTC3823 is tested in a feedback loop that servos V FB to
achieve a speci?ed error ampli?er output voltage (I TH ).
Note 4: The LTC3823E is guaranteed to meet performance speci?cations
from 0°C to 85°C. Speci?cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3823I is guaranteed over the full
–40°C to 85°C operating temperature range.
LTC3823UH: T J = T A + (P D ? 34°C/W)
TYPICAL PERFORMANCE CHARACTERISTICS
Current Sense Threshold
vs I TH Voltage
On-Time vs I ON Current
On-Time vs V ON Voltage
300
250
V RNG = 2V
1.4V
10000
V ON = 0V
800
700
I ION = 60μA
200
150
1V
0.7V
1000
600
500
100
50
0.5V
400
0
–50
–100
100
300
200
100
–150
0
0.5
1
1.5
2
2.5
10
0
10 20 30 40 50 60 70 80 90 100
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
I TH VOLTAGE (V)
2823 G01
I ON CURRENT (μA)
3823 G02
V ON VOLTAGE (V)
3823 G03
3823fd
4
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