MIC23303 Datasheet, PDF (3/21 Pages) Micrel Semiconductor – 4MHz PWM 3A Buck Regulator with HyperLight Load™ and Power Good

Micrel, Inc.
MIC23303
Absolute Maximum Ratings⁽³⁾
Supply Voltage (V_IN) .......................................... −0.3V to 6V
Sense Voltage (V_SNS) ........................................ −0.3V to V_IN
Output Switch Voltage (V_SW) ............................. −0.3V to V_IN
Enable Input Voltage (V_EN)................................−0.3V to V_IN
Power Good Voltage (V_PG) ................................ −0.3V to V_IN
Storage Temperature Range .................... −65°C to +150°C
Lead temperature (soldering, 10s) ............................. 260°C
ESD Rating⁽⁵⁾................................................. ESD Sensitive
Operating Ratings⁽⁴⁾
Supply Voltage (V_IN) ........................................ .2.7V to 5.5V
Enable Input Voltage (V_EN) .................................... 0V to V_IN
Sense Voltage (V_SNS) ..................................... 0.65V to 5.5V
Junction Temperature Range (T_J)...... .−40°C ≤ T_J ≤ +125°C
Thermal Resistance
3mm × 3mm DFN-12 (θ_JA) ................................. 61°C/W
3mm × 3mm DFN-12 (θ_JC).................................27°C/W
Electrical Characteristics⁽⁶⁾
TA = 25°C; VIN = VEN = 3.6V; VOUT=1.8V; L = 0.33µH; COUT = 44µF unless otherwise specified.
Bold values indicate –40°C ≤ TJ ≤ +125°C, unless otherwise noted.
Parameter
Condition
Min.
Typ.
Supply Voltage Range
2.7
Undervoltage Lockout Threshold (turn-on)
2.3
2.53
Undervoltage Lockout Hysteresis
275
Quiescent Current
Shutdown Current
Output Voltage Accuracy
Feedback Regulation Voltage
Current Limit
Output Voltage Line Regulation
Output Voltage Load Regulation
PWM Switch ON-Resistance
Switching Frequency
Maximum Duty Cycle^{(7, 8)}
IOUT = 0mA, SNS > 1.2 × VOUT Nominal
VEN = 0V; VIN = 5.5V
VIN = 3.6V if VOUTNOM < 2.5V, ILOAD = 20mA
VIN = 4.5V if VOUTNOM ≥ 2.5V, ILOAD = 20mA
ILOAD = 20mA
SNS = 0.9 × VOUTNOM
VIN = 3.6V to 5.5V if VOUTNOM < 2.5V, ILOAD = 20mA
VIN = 4.5V to 5.5V if VOUTNOM ≥ 2.5V, ILOAD = 20mA
20mA < ILOAD < 500mA, VIN = 3.6V if VOUTNOM < 2.5V
20mA < ILOAD < 500mA, VIN = 5.0V if VOUTNOM ≥ 2.5V
20mA < ILOAD < 1A, VIN = 3.6V if VOUTNOM < 2.5V
20mA < ILOAD < 1A, VIN = 5.0V if VOUTNOM ≥ 2.5V
ISW = 100mA PMOS
ISW = −100mA NMOS
IOUT = 300mA
−2.5
0.604
3.5
80
24
0.01
0.62
6.5
0.3
0.3
0.7
0.075
0.055
4
85
Soft Start Time
VOUT = 90%, CSS = 2.2nF
Notes:
3. Exceeding the absolute maximum rating may damage the device.
4. The device is not guaranteed to function outside its operating rating.
5. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
6. Specification for packaged product only.
7. The maximum duty cycle is limited by the fixed mandatory off time of 300ns.
8. Guaranteed by design.
1.26
Max.
5.5
2.8
40
5
Units
V
V
mV
µA
µA
+2.5
%
0.635
V
10
A
%/V
%
%
Ω
MHz
%
ms
September 6, 2013
3
090613-2.0