MIC4685WREV MICREL [Micrel Semiconductor], MIC4685WREV Datasheet - Page 4

• Manufacturer Part Number: MIC4685WREV
• Description: 3A SPAK SuperSwitcher Buck Regulator
• Manufacturer: MICREL [Micrel Semiconductor]

Absolute Maximum Ratings
Supply Voltage (V
Enable Voltage (V
Steady-State Output Switch Voltage (V
Feedback Voltage (V
Storage Temperature (T
EDS Rating
Electrical Characteristics
V
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
4. 2.5V of headroom is required between V
Micrel, Inc.
Parameter
MIC4685 [Adjustable]
Feedback Voltage
Feedback Bias Current
Maximum Duty Cycle
Output Leakage Current
Quiescent Current
Bootstrap Drive Current
Bootstrap Voltage
Frequency Fold Back
Oscillator Frequency
Saturation Voltage
Short Circuit Current Limit
Shutdown Current
Enable Input Logic Level
Enable Pin Input Current
Thermal Shutdown @ T
January 2010
IN
circuit on page 1.
= V
EN
= 12V; V
(3)
.................................................................. 2kV
IN
EN
OUT
)
)......................................... –0.3V to V
(1)
FB
5V; I
J
) ...............................................+12V
.................................................+34V
s
) .........................–65°C to +150°C
OUT
Condition
(±2%)
(±3%)
8V ≤ V
V
V
V
V
V
I
V
I
V
V
regulator on
regulator off
V
V
BS
OUT
= 500mA; T
FB
IN
IN
FB
FB
FB
FB
EN
EN
EN
= 10mA, V
= 30V, V
= 30V, V
= 1.0V
= 1.5V
= 1.5V, V
= 0V
= 0V, See Test Circuit
= 0V
= 0V (regulator off)
= 0V (regulator on)
= 1A
IN
IN
and V
≤ 30V, 0.1A ≤ I
(1)
SW
EN
EN
OUT
) .......... –1V to V
SW
A
FB
= 0V, V
= 0V, V
. The headroom can be reduced by implementing a bootstrap diode as seen on the 5V to 3.3V
= 25°C, bold values indicate –40°C< T
= 1.5V, V
= 0V
SW
SW
LOAD
= 0V
= 1V
SW
≤ 1A, V
= 0V
IN
IN
OUT
4
Operating Ratings
Supply Voltage (V
Junction Temperature (T
Package Thermal Resistance
= 5V, Note 4
SPAK-7 (θ
SPAK-7 (θ
JA
JC
) ...................................................11.8°C/W
).....................................................2.2°C/W
IN
)
J
(4)
< +125°C, unless noted.
..................................... +4V to +30V
J
(2)
) ........................ –40°C to +125°C
1.210
1.198
1.186
1.173
Min
250
180
5.5
3.5
30
–1
2
1.235
1.235
–0.83
0.59
Typ
380
200
150
160
1.4
6.2
50
94
70
16
5
6
1.260
1.272
1.284
1.297
Max
500
120
225
200
0.8
M9999-012610
20
12
50
6
MIC4685
Units
kHz
kHz
mA
mA
mA
mA
µA
µA
µA
nA
°C
%
V
V
V
V
V
V
A
V
V