Datasheet > MIC4690

MIC4690

更新时间： 2023-12-06 20:01:39

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
12页	275K
描述
The MIC4690 SuperSwitcher? is an easy-to-use, 500kHz step-down PWM voltage regulator. The MIC4

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MIC4690 数据手册

MIC4690

Micrel

Absolute Maximum Ratings (Note 1)

Operating Ratings (Note 2)

Supply Voltage (V ), Note 3 ......................................+34V

Supply Voltage (V ) ....................................... +4V to +30V

Shutdown Voltage (V

Steady-State Output Switch Voltage (V ) ....... –1V to V

) ............................. –0.3V to V

Junction Temperature Range (T ) ........... –40°C to +125°C

Package Thermal Resistance

SHDN

(θ ), Note 5........................................................63°C/W

Feedback Voltage (V )..............................................+12V

(θ ), ...................................................................20°C/W

Storage Temperature (T ) ....................... –65°C to +150°C

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

Condition

Min

1.217 1.230 1.243

1.205 1.255

1.193 1.230 1.267

Typ

Max

Units

Feedback Voltage

(±1%)

(±2%)

8V ≤ V_IN≤ 30V, 0.1A ≤ I_LOAD≤ 1A, V_OUT= 5V

1.180

1.280

Maximum Duty Cycle

Quiescent Current

V_FB= 1.0V

µA

KHz

kHz

V_FB= 1.5V

Standby Quiescent Current

V_SHDN= 5V (regulator off)

V_SHDN= 12V (regulator off)

V_FB= 0V

100

1.5

220

500

1.2

Frequency Foldback

Oscillator Frequency

Saturation Voltage

300

550

450

I_OUT= 1A

Output Leakage Current

V_IN= 30V, V_SHDN= 5V, V_SW= 0V

V_IN= 30V, V_SHDN= 5V, V_SW= –1V

V_FB= 0V, V_OUT= 0V, See Test Circuit

regulator off

500

µA

Short Circuit Current Limit

1.3

2.5

1.5

1.25

–0.7

–1.5

160

3.0

Shutdown Pin Input Logic Level

regulator on

0.8

Shutdown Pin Input Current

Thermal Shutdown @ T_J

V_SHDN= 5V (regulator off)

V_SHDN= 0V (regulator on)

–10

µA

°C

Note 1. Exceeding the absolute maximum rating may damage the device.

Note 2. 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.

Note 3. Absolute maximum rating is intended for voltage transients only, prolonged dc operation is not recommended.

Note 4. Devices are ESD sensitive. Handling precautions recommended.

Note 5. Measured on 1" square of 1 oz. copper FR4 printed circuit board connected to the device ground leads.

April 2005

MIC4690

1 234 5 6 7...12

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