MIC2203 Datasheet, PDF (3/13 Pages) Micrel Semiconductor – High Efficiency 1MHz Synchronous Buck Regulator

Micrel, Inc.
MIC2203
Absolute Maximum Ratings⁽¹⁾
Supply Voltage (V_IN) .............................................. 6V
Output Switch Voltage (V_SW) ................................. 6V
Logic Input Voltage (V_EN, V_{SYNC_IN}) .............V_IN to –3V
Power Dissipation ............................................Note 5
Storage Temperature (T_s)............... –65°C to +150°C
ESD Rating⁽³⁾ ........................................................2kV
Operating Ratings⁽²⁾
Supply Voltage (V_IN)................................2.3V to 5.5V
Junction Temperature Range ......... –40°C to +125°C
Package Thermal Resistance
MSOP-10L (θ_JA)..................................... 115°C/W
3mmX3mm MLF-10L (θ_JA)....................... 60°C/W
Electrical Characteristics⁽⁴⁾
T_A = 25°C with V_IN = V_EN = 3.5V, unless otherwise specified. Bold values indicate –40ºC < T_J < +125ºC
Parameter
Condition
Min
Typ
Supply Voltage Range
2.3
Quiescent Current
V_FB = 0.6V (not switching)
320
EN = 0V (shutdown)
0.01
No Load Supply Current (switching)
870
MIC2203 [Adjustable]
Feedback Voltage
0.4875 0.5
Output Voltage Line
Regulation
V_OUT < 2V; V_IN = 2.3V to 5.5V, I_LOAD= 50mA
0.13
Output Voltage Load
0mA < I_LOAD < 300mA
0.2
Regulation
Bias Regulator Output
Voltage
2.2
2.32
Maximum Duty Cycle
Current Limit
Switch ON-Resistance
Enable Input Current
V_FB ≤ 0.4V
V_FB = 0.4V
I_SW = 300mA V_FB = 0.4V
I_SW = -300mA V_FB = 0.6V
100
0.375
0.6
1.5
1
0.01
Sync Frequency Range
0.8
SYNC_IN Threshold
0.7
1
Sync Minimum Pulse
10
Width
SYNC_IN Input Current
Oscillator Frequency
0.8
1
Enable Threshold
0.5
0.7
Enable Hysteresis
20
Over Temperature
160
Shutdown
Hysteresis
20
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. Absolute maximum power dissipation is limited by maximum junction temperature where PD(MAX) = (TJ(MAX) – TA) θ÷ JA.
Max
5.5
450
1
0.5125
0.5
0.5
2.6
1.5
2.2
1.6
2
1.25
1.7
1
1.2
1.3
Units
V
µA
µA
µA
V
%
%
V
%
A
Ω
µA
MHz
V
ns
µA
MHz
V
mV
°C
December 2004
3
M9999-120604
[phone]