MIC4720 Datasheet, PDF (4/21 Pages) Micrel Semiconductor – 3mm x 3mm 2.0MHz 2A Integrated Switch Buck Regulator

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
Condition
Min Typ Max
Supply Voltage Range
2.7
5.5
Under-Voltage Lockout Threshold (turn-on)
2.45 2.55 2.65
UVLO Hysteresis
100
Quiescent Current
V_FB = 0.9 × V_NOM (not switching)
570
900
Shutdown Current
V_EN = 0V
2
10
[Adjustable] Feedback Voltage
± 2% (over temperature) I_LOAD = 100mA
0.98
1.02
FB pin input current
1
Current Limit
Output Voltage Line Regulation
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
3.5
5
0.07
Output Voltage Load Regulation
20mA < I_LOAD < 2A
0.2
Maximum Duty Cycle
V_FB ≤ 0.4V
100
Switch ON-Resistance
I_SW = 200mA V_FB = GND (High Side Switch)
95
200
300
Oscillator Frequency
1.8
2.0
2.2
Enable Threshold
0.5 0.85
1.3
Enable Hysteresis
50
Enable Input Current
0.1
2.3
Power Good Range
±7
±10
Power Good Resistance
I_PGOOD = 500µA
150
250
Over-Temperature Shutdown
160
Over-Temperature Hysteresis
25
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.
Units
V
V
mV
µA
µA
V
nA
A
%
%
%
mΩ
MHz
V
mV
µA
%
Ω
°C
°C
May 2007
4
M9999-051707