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MIC2206 Datasheet, PDF (3/12 Pages) Micrel Semiconductor – 2MHz PWM Synchronous Buck Regulator with LOWQ Mode and Voltage Scaling
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Micrel
MIC2206
Absolute Maximum Ratings(1)
Supply Voltage (VIN) ............................................ +6V
Output Switch Voltage (VSW) ............................... +6V
Output Switch Current (ISW) ................................... 2A
Logic Input Voltage (VEN,VLOWQ) .............. -0.3V to VIN
Storage Temperature (Ts)................ -60°C to +150°C
ESD Rating(3) ....................................................... 3kV
Operating Ratings(2)
Supply Voltage (VIN)............................+2.7V to +5.5V
Logic Input Voltage (VEN,VLOWQ) .............. -0.3V to VIN
Junction Temperature (TJ) .............. –40°C to +125°C
Junction Thermal Resistance
3x3 MLF-10L (θJA) ................................... 60°C/W
Electrical Characteristics (4)
VIN = VEN = VLOWQ =3.6V; L = 2.2µH; COUT = 2.2µF; TA = 25°C, unless noted. Bold values indicate –40°C< TJ < +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, PWM
mode
VFB = 0.9 * VNOM (not switching)
690
900
µA
Quiescent Current, LDO
mode
VLOWQ = 0V;IOUT = 0mA
18
29
µA
Shutdown Current
VEN = 0V
0.1
5
µA
[Fixed Output] Voltages
Nominal VOUT tolerance
-1
-2
+1
+2
%
Current Limit in PWM Mode VFB = 0.9 * VNOM
0.75
1
1.85
A
Output Voltage Line
VOUT > 2V; VIN = VOUT+300mV to 5.5V; ILOAD= 100mA
0.13
%
Regulation
VOUT < 2V; VIN = 2.7V to 5.5V; ILOAD= 100mA
Output Voltage Load
Regulation, PWM Mode
20mA < ILOAD < 300mA
0.2
0.5
%
Output Voltage Load
Regulation, LDO Mode
100µA < ILOAD < 50mA
VLOWQ = 0V
0.2
0.5
%
Maximum Duty Cycle
VFB ≤ 0.4V
100
%
PWM Switch ON-
Resistance
ISW = 50mA VFB = 0.7VFB_NOM (High Side Switch)
ISW = -50mA VFB = 1.1VFB_NOM (Low Side Switch)
0.4
Ω
0.4
Oscillator Frequency
1.8
2
2.2
MHz
LOWQ threshold voltage
0.5
0.85
1.3
V
LOWQ Input Current
Enable Threshold
Enable Input Current
0.1
2
µA
0.5
0.85
1.3
V
0.1
2
µA
April 2005
3
M9999-041905
www.micrel.com
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