mic4690 Micrel Semiconductor, mic4690 Datasheet - Page 3

• Manufacturer Part Number: mic4690
• Description: Mic4690 500khz 1a Superswitcher? Buck Regulator
• Manufacturer: Micrel Semiconductor

Absolute Maximum Ratings
Supply Voltage (V
Shutdown Voltage (V
Steady-State Output Switch Voltage (V
Feedback Voltage (V
Storage Temperature (T
ESD Rating .............................................................. Note 4
Electrical Characteristics
V
Parameter
Feedback Voltage
Maximum Duty Cycle
Quiescent Current
Standby Quiescent Current
Frequency Foldback
Oscillator Frequency
Saturation Voltage
Output Leakage Current
Short Circuit Current Limit
Shutdown Pin Input Logic Level
Shutdown Pin Input Current
Thermal Shutdown @ T
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
April 2005
MIC4690
IN
= 12V, V
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.
OUT
= 5V; I
IN
), Note 3 ...................................... +34V
FB
SHDN
LOAD
J
) .............................................. +12V
S
) ....................... –65°C to +150°C
) ............................. –0.3V to V
= 500mA; V
Condition
(±1%)
(±2%)
8V ≤ V
V
V
V
V
V
I
V
V
V
regulator off
regulator on
V
V
OUT
FB
FB
SHDN
SHDN
FB
IN
IN
FB
SHDN
SHDN
= 30V, V
= 30V, V
= 1.0V
= 1.5V
= 0V
= 0V, V
SHDN
= 1A
IN
SW
= 5V (regulator off)
= 12V (regulator off)
= 5V (regulator off)
= 0V (regulator on)
(Note 1)
≤ 30V, 0.1A ≤ I
) ....... –1V to V
= 0V, T
OUT
SHDN
SHDN
= 0V, See Test Circuit
= 5V, V
= 5V, V
J
= 25°C, unless otherwise noted. Bold values indicate –40°C ≤ T
LOAD
SW
SW
IN
IN
= 0V
= –1V
≤ 1A, V
3
Operating Ratings
Supply Voltage (V
Junction Temperature Range (T
Package Thermal Resistance
(θ
(θ
OUT
JA
JC
), Note 5 ........................................................ 63°C/W
), ................................................................... 20°C/W
= 5V
IN
) ....................................... +4V to +30V
(Note 2)
1.217
1.205
1.193
1.180
Min
450
–10
–10
1.3
90
2
J
) ........... –40°C to +125°C
1.230
1.230
1.25
–0.7
–1.5
Typ
220
500
160
1.5
1.2
2.5
1.5
93
30
50
7
4
1.243
1.255
1.267
1.280
J
Max
100
300
550
500
3.0
0.8
12
20
10
10
≤ +125°C.
MIC4690
Micrel
Units
KHz
kHz
mA
mA
µA
µA
µA
µA
µA
°C
%
V
V
V
V
V
A
V
V