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参数资料
| 型号： | MIC4690YM TR |
| 厂商： | Micrel Inc |
| 文件页数： | 3/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1A 8SOIC |
| 标准包装： | 2,500 |
| 系列： | SuperSwitcher™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 1.235V |
| 输入电压： | 4 V ~ 34 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 500kHz |
| 电流 - 输出： | 1A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
| 其它名称： | MIC4690YMTR MIC4690YMTR-ND |
MIC4690
Absolute Maximum Ratings (Note 1)
Supply Voltage (V IN ), Note 3 ...................................... +34V
Shutdown Voltage (V SHDN ) ............................. –0.3V to V IN
Steady-State Output Switch Voltage (V SW ) ....... –1V to V IN
Feedback Voltage (V FB ) .............................................. +12V
Storage Temperature (T S ) ....................... –65 ° C to +150 ° C
Micrel
Operating Ratings (Note 2)
Supply Voltage (V IN ) ....................................... +4V to +30V
Junction Temperature Range (T J ) ........... –40 ° C to +125 ° C
Package Thermal Resistance
( θ JA ), Note 5 ........................................................ 63 ° C/W
( θ JC ), ................................................................... 20 ° C/W
ESD Rating .............................................................. Note 4
Electrical Characteristics
V IN = 12V, V OUT = 5V; I LOAD = 500mA; V SHDN = 0V, T J = 25 ° C, unless otherwise noted. Bold values indicate –40 ° C ≤ T J ≤ +125 ° C.
Parameter
Feedback Voltage
Condition
( ± 1%)
( ± 2%)
8V ≤ V IN ≤ 30V, 0.1A ≤ I LOAD ≤ 1A, V OUT = 5V
Min
1.217
1.205
1.193
Typ
1.230
1.230
Max
1.243
1.255
1.267
Units
V
V
V
1.180
1.280
V
Maximum Duty Cycle
V FB = 1.0V
90
93
%
Quiescent Current
Standby Quiescent Current
Frequency Foldback
Oscillator Frequency
Saturation Voltage
Output Leakage Current
V FB = 1.5V
V SHDN = 5V (regulator off)
V SHDN = 12V (regulator off)
V FB = 0V
I OUT = 1A
V IN = 30V, V SHDN = 5V, V SW = 0V
V IN = 30V, V SHDN = 5V, V SW = –1V
450
7
30
1.5
220
500
1.2
50
4
12
100
300
550
500
20
mA
μ A
μ A
KHz
kHz
V
μ A
mA
Short Circuit Current Limit
Shutdown Pin Input Logic Level
Shutdown Pin Input Current
V FB = 0V, V OUT = 0V, See Test Circuit
regulator off
regulator on
V SHDN = 5V (regulator off)
V SHDN = 0V (regulator on)
1.3
2
–10
–10
2.5
1.5
1.25
–0.7
–1.5
3.0
0.8
10
10
A
V
V
μ A
μ A
Thermal Shutdown @ T J
160
° C
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Exceeding the absolute maximum rating may damage the device.
With input voltages above the operating rating, the device may be damaged if a short-circuit is applied to the output. The device will otherwise
not be damaged up to its absolute maximum voltage rating.
Absolute maximum rating is intended for voltage transients only, prolonged dc operation is not recommended.
Devices are ESD sensitive. Handling precautions recommended.
Measured on 1" square of 1 oz. copper FR4 printed circuit board connected to the device ground leads.
April 2005
3
MIC4690
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