Micrel, Inc.
MIC4720
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) .......................................................+6V
Output Switch Voltage (V
SW
). .........................................+6V
Output Switch Current (
SW
).............................................11A
Logic Input Voltage (V
EN
) .................................. –0.3V to V
IN
Storage Temperature (T
s
) .........................–60°C to +150°C
Operating Ratings
(2)
Supply voltage (V
IN
) ..................................... +2.7V to +5.5V
Logic Input Voltage (V
EN
) ....................................... 0V to V
IN
Junction Temperature (T
J
) ........................ –40°C to +125°C
Junction Thermal Resistance
3mm×3mm MLF-12 (θ
JA
) ...................................60°C/W
3mm×3mm MLF-12 (θ
JC
)...................................10°C/W
10 pin ePad MSOP (θ
JA
)....................................76°C/W
10 pin ePad MSOP (θ
JC
)....................................28°C/W
Electrical Characteristics
(3)
V
IN
= V
EN
= 3.6V; L = 1µH; C
OUT
= 4.7µF; T
A
= 25°C, unless noted.
Bold
values indicate –40°C< T
J
< +125°C.
Parameter
Supply Voltage Range
Under-Voltage Lockout Threshold
UVLO Hysteresis
Quiescent Current
Shutdown Current
[Adjustable] Feedback Voltage
FB pin input current
Current Limit
Output Voltage Line Regulation
Output Voltage Load Regulation
Maximum Duty Cycle
Switch ON-Resistance
Oscillator Frequency
Enable Threshold
Enable Hysteresis
Enable Input Current
Power Good Range
Power Good Resistance
Over-Temperature Shutdown
Over-Temperature Hysteresis
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Specification for packaged product only.
Condition
(turn-on)
V
FB
= 0.9 × V
NOM
(not switching)
V
EN
= 0V
±
2% (over temperature) I
LOAD
= 100mA
V
FB
= 0.9 × V
NOM
V
OUT
> 2V; V
IN
= V
OUT
+500mV to 5.5V; I
LOAD
= 100mA
V
OUT
< 2V; V
IN
= 2.7V to 5.5V; I
LOAD
= 100mA
20mA < I
LOAD
< 2A
V
FB
≤
0.4V
I
SW
= 200mA V
FB
= GND (High Side Switch)
Min
2.7
2.45
Typ
2.55
100
570
2
Max
5.5
2.65
900
10
1.02
Units
V
V
mV
µA
µA
V
nA
A
%
%
%
0.98
1
3.5
5
0.07
0.2
100
95
1.8
0.5
2.0
0.85
50
0.1
±7
200
300
2.2
1.3
2.3
±10
250
mΩ
MHz
V
mV
µA
%
Ω
°C
°C
I
PGOOD
= 500µA
150
160
25
May 2007
4
M9999-051707
MICREL [ MICREL SEMICONDUCTOR ]
