MIC2207_10 Datasheet, PDF (3/18 Pages) Micrel Semiconductor – 3mm x 3mm 2MHz 3A PWM Buck Regulator

Micrel, Inc.
MIC2207
Absolute Maximum Ratings⁽¹⁾
Supply Voltage (V_IN) .......................................................+6V
Output Switch Voltage (V_SW) ..........................................+6V
Output Switch Current (I_SW)............................................11A
Logic Input Voltage (V_EN) .................................. –0.3V to V_IN
Storage Temperature (T_s) .........................–60°C to +150°C
ESD Rating⁽³⁾.................................................................. 2kV
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
3x3 MLF-12L (θ_JA) .............................................60°C/W
Electrical Characteristics⁽⁴⁾
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
Units
Supply Voltage Range
2.7
5.5
V
Under-Voltage Lockout
Threshold
(turn-on)
2.45 2.55 2.65
V
UVLO Hysteresis
100
mV
Quiescent Current
Shutdown Current
[Adjustable] Feedback
Voltage
FB pin input current
V_FB = 0.9 * VNOM (not switching)
V_EN = 0V
± 1% I_LOAD = 100mA
± 2% (over temperature) I_LOAD = 100mA
570
900
µA
2
10
µA
0.99
1
1.01
V
0.98
1.02
1
nA
Current Limit in PWM Mode
Output Voltage
Line Regulation
Output Voltage
Load 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
20mA < I_LOAD < 3A
3.5
5
A
0.07
%
0.2
0.5
%
Maximum Duty Cycle
PWM Switch ON-Resistance
V_FB ≤ 0.4V
I_SW = 50mA; V_FB = 0.7V_{FB_NOM} (High Side Switch)
100
%
95
200
mΩ
300
Oscillator Frequency
1.8
2
2.2
MHz
Enable Threshold
0.5 0.85
1.3
V
Enable Hysteresis
50
mV
Enable Input Current
0.1
2
µA
Power Good Range
±7
±10
%
Power Good Resistance
I_PGOOD = 500µA
Over-Temperature Shutdown
145
250
Ω
160
°C
Over-Temperature Hysteresis
20
°C
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, 1.5k in series with 100pF.
4. Specification for packaged product only.
5. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value that is initially measured at
a 1V differential. For outputs below 2.7V, the dropout voltage is the input-to-output voltage differential with a minimum input voltage of 2.7V.
April 2010
3
M9999-041910