参数资料
型号: MIC2194BM
厂商: Micrel Inc
文件页数: 3/10页
文件大小: 0K
描述: IC REG CTRLR BST PWM CM 8-SOIC
标准包装: 95
PWM 型: 电流模式
输出数: 1
频率 - 最大: 440kHz
占空比: 100%
电源电压: 2.9 V ~ 14 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
包装: 管件
MIC2194
Absolute Maximum Ratings (Note 1)
Supply Voltage (V IN ) ..................................................... 15V
Digital Supply Voltage (V DD ) ........................................... 7V
Enable Pin Voltage (V EN ) ............................. – 0.3V to +15V
Comp Pin Voltage (V COMP ) ............................ – 0.3V to +3V
Micrel
Operating Ratings (Note 2)
Supply Voltage (V IN ) .................................... +2.9V to +14V
Junction Temperature ....................... – 40 ° C ≤ T J ≤ +125 ° C
Package Thermal Resistance
θ JA 8-lead SOP ................................................. 140 ° C/W
Feedback Pin Voltage (V FB ) .......................... – 0.3V to +3V
Current Sense Voltage (V IN – V CS ) ................. – 0.3V to +1V
Power Dissipation (P D ) ..................... 285mW @ T A = 85 ° C
Ambient Storage Temp ............................ – 65 ° C to +150 ° C
ESD Rating, Note 3 ...................................................... 2kV
Electrical Characteristics
V IN = 5V, V OUT = 3.3V, T J = 25 ° C, unless otherwise specified. Bold values indicate – 40 ° C<T J <+125 ° C.
Parameter
Condition
Min
Typ
Max
Units
Regulation
Feedback Voltage Reference
(1%)
(2%)
1.233
1.22
1.245
1.245
1.257
1.27
V
V
Feedback Bias Current
50
nA
Output Voltage Line Regulation
Output Voltage Load Regulation
5V ≤ V IN ≤ 9V
0mV < (V IN – V CS ) < 75mV
0.15
0.9
%/V
%
Output Voltage Total Regulation
5V ≤ V IN ≤ 9V, 0mV < (V IN – V CS ) < 75mV ( ± 3%)
1.208
1.282
V
Input & V DD Supply
V IN Input Current (I Q )
Shutdown Current (I SD )
(excluding external MOSFET gate current)
V EN = 0V
1
0.5
2
5
mA
μ A
Digital Supply Voltage (V DD )
Digital Supply Load Regulation
Undervoltage Lockout
I L = 0
I L = 0 to 1mA
V DD upper threshold (turn on threshold)
2.82
3.0
0.1
2.65
3.18
V
V
V
UVLO Hysteresis
Enable/UVLO
100
mV
Enable Input Threshold
UVLO Threshold
Enable Input Current
V EN/UVLO = 5V
0.6
1.4
0.9
1.5
0.2
1.2
1.6
5
V
V
μ A
Current Limit
Current Limit Threshold Voltage
V IN – V CS voltage to trip current limit
90
110
130
mV
Error Amplifier
Error Amplifier Gain
Current Amplifier
Current Amplifier Gain
Oscillator Section
20
3.0
V/V
V/V
Oscillator Frequency (f O )
360
400
440
kHz
Maximum Duty Cycle
Minimum On Time
Frequency Foldback Threshold
Frequency Foldback Frequency
April 2005
V FB = 1.0V
V FB = 1.5V
Measured on FB
3
100
165
0.3
90
%
ns
V
kHz
MIC2194
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