MIC23031 Datasheet, PDF (3/17 Pages) Micrel Semiconductor – 4MHz PWM 400mA Buck Regulator with Hyper Light Load™

Micrel Inc.
MIC23031
Absolute Maximum Ratings⁽¹⁾
Supply Voltage (V_IN) . ……………………………………….6V
Sense (V_SNS).. ..................................................................6V
Output Switch Voltage ..................................................6V
Enable Input Voltage (V_EN).. ..............................-0.3V to V_IN
Storage Temperature Range .. ……………-65°C to +150°C
ESD Rating⁽³⁾................................................. ESD Sensitive
Operating Ratings⁽²⁾
Supply Voltage (V_IN)... …………………………..2.7V to 5.5V
Enable Input Voltage (V_EN) .. ……………………….0V to V_IN
Output Voltage Range (V_SNS) ………………….0.7V to 3.6V
Junction Temperature Range (T_J)... ….-40°C ≤ T_J ≤ +125°C
Thermal Resistance
1.6 x 1.6mm Thin MLF^®-6 (θ_JA).......................92.4°C/W
Electrical Characteristics⁽⁴⁾
T_A = 25°C; V_IN = V_EN = 3.6V; L = 1µH; C_OUT = 4.7µF unless otherwise specified.
Bold values indicate –40°C ≤ T_J ≤ +125°C, unless noted.
Parameter
Condition
Supply Voltage Range
Under-Voltage Lockout Threshold
(turn-on)
Quiescent Current
Shutdown Current
Output Voltage Accuracy
I_OUT = 0mA , SNS > 1.2 * V_OUT Nominal
V_EN = 0V V_IN = 5.5V
V_IN = 3.6V; I_LOAD = 20mA
Min
Typ
Max Units
2.7
5.5
V
2.45
2.55
2.65
V
21
35
µA
0.01
4
µA
-2.5
+2.5
%
Feedback Voltage
Adjustable Option Only
0.62
Current Limit
SNS = 0.9*V_OUTNOM
0.41
Output Voltage Line Regulation
Output Voltage Load Regulation
V_IN = 3.0V to 5.5V, V_OUT = 1.2V, I_LOAD = 20mA,
20mA < I_LOAD < 400mA, V_OUT = 1.2V, V_IN =
3.6V
PWM Switch ON-Resistance
Frequency
I_SW = 100mA PMOS
I_SW = -100mA NMOS
I_OUT = 120mA
SoftStart Time
V_OUT = 90%
Enable Threshold
0.5
Enable Input Current
Over-temperature Shutdown
Over-temperature Shutdown Hysteresis
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, 1.5kΩ in series with 100pF.
4. Specification for packaged product only.
0.7
0.3
0.7
0.65
0.8
4
100
0.9
0.1
160
20
V
1
A
%/V
%
Ω
MHz
µs
1.2
V
2
µA
°C
°C
May 2008
3
M9999-051608-A