MIC4690(2001) Просмотр технического описания (PDF) - Micrel
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MIC4690 Datasheet PDF : 12 Pages
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MIC4690
Absolute Maximum Ratings (Note 1)
Supply Voltage (VIN), Note 3 ...................................... +34V
Shutdown Voltage (VSHDN) ............................. –0.3V to VIN
Steady-State Output Switch Voltage (VSW) ....... –1V to VIN
Feedback Voltage (VFB) .............................................. +12V
Storage Temperature (TS) ....................... –65°C to +150°C
ESD Rating .............................................................. Note 4
Micrel
Operating Ratings (Note 2)
Supply Voltage (VIN) ....................................... +4V to +30V
Junction Temperature Range (TJ) ........... –40°C to +125°C
Package Thermal Resistance
(θJA), Note 5 ........................................................ 63°C/W
(θJC), ................................................................... 20°C/W
Electrical Characteristics
VIN = 12V, VOUT = 5V; ILOAD = 500mA; VSHDN = 0V, TJ = 25°C, unless otherwise noted. Bold values indicate –40°C ≤ TJ ≤ +125°C.
Parameter
Condition
Min Typ Max Units
Feedback Voltage
(±1%)
(±2%)
1.217 1.230 1.243 V
1.205
1.255 V
8V ≤ VIN ≤ 30V, 0.1A ≤ ILOAD ≤ 1A, VOUT = 5V
1.193 1.230 1.267 V
1.180
1.280 V
Maximum Duty Cycle
Quiescent Current
Standby Quiescent Current
Frequency Foldback
Oscillator Frequency
VFB = 1.0V
VFB = 1.5V
VSHDN = 5V (regulator off)
VSHDN = 12V (regulator off)
VFB = 0V
90
93
%
7
12
mA
30
100
µA
1.5
µA
220 300 KHz
450 500 550 kHz
Saturation Voltage
Output Leakage Current
Short Circuit Current Limit
Shutdown Pin Input Logic Level
IOUT = 1A
VIN = 30V, VSHDN = 5V, VSW = 0V
VIN = 30V, VSHDN = 5V, VSW = –1V
VFB = 0V, VOUT = 0V, See Test Circuit
regulator off
1.2
V
50
500
µA
4
20
mA
1.3
2.5
3.0
A
2
1.5
V
regulator on
1.25 0.8
V
Shutdown Pin Input Current
Thermal Shutdown @ TJ
VSHDN = 5V (regulator off)
VSHDN = 0V (regulator on)
–10 –0.7 10
µA
–10 –1.5 10
µA
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.
June 2001
3
MIC4690
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