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| MIC23155 Datasheet, PDF (3/19 Pages) Micrel Semiconductor – 3MHz PWM 2A Buck Regulator with HyperLight Load and Power Good | |||
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Micrel Inc.
MIC23155
Absolute Maximum Ratings(1)
Supply Voltage (VIN) ........................................... -0.3V to 6V
Sense Voltage (VSNS) .........................................-0.3V to VIN
Output Switch Voltage (VSW) ..............................-0.3V to VIN
Enable Input Voltage (VEN).. ..............................-0.3V to VIN
Power Good Voltage (VPG).................................-0.3V to VIN
Storage Temperature Range .. â¦â¦â¦â¦â¦-65°C to +150°C
Lead temperature (soldering, 10 sec.) ....................... 260°C
ESD Rating(3)................................................. ESD Sensitive
Operating Ratings(2)
Supply Voltage (VIN)... â¦â¦â¦â¦â¦â¦â¦â¦â¦â¦..2.7V to 5.5V
Enable Input Voltage (VEN) .. â¦â¦â¦â¦â¦â¦â¦â¦â¦.0V to VIN
Sense Voltage (VSNS) .......................................... 0.7V to VIN
Junction Temperature Range (TJ)... â¦.-40°C ⤠TJ ⤠+125°C
Thermal Resistance
2.5mm x 2.5mm Thin MLF-10 (θJA) ...................90°C/W
2.5mm x 2.5mm Thin MLF-10 (θJC) ...................63°C/W
Electrical Characteristics(4)
TA = 25°C; VIN = VEN = 3.6V; L = 1.0µH; COUT = 4.7µF unless otherwise specified.
Bold values indicate â40°C ⤠TJ ⤠+125°C, unless noted.
Parameter
Condition
Supply Voltage Range
Under Voltage Lockout Threshold Rising
Under Voltage Lockout Hysteresis
Quiescent Current
IOUT = 0mA , SNS > 1.2 * VOUTNOM
Shutdown Current
Output Voltage Accuracy (Fixed)
Feedback Regulation Voltage
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
Feedback Bias Current
IFB
Current Limit
Output Voltage Line Regulation
Output Voltage Load Regulation
PWM Switch RDSON
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
Switching Frequency
IOUT = 180mA
Soft Start Time
VOUT = 90%, CSS = 470pF
Soft Start Current
VSS = 0V
Power Good Threshold (Rising)
Power Good Threshold Hysteresis
Power Good Delay Time
Rising
Power Good Pull Down
Resistance
Enable Input Voltage
Logic Low
Logic High
Enable Input Current
Output Discharge Resistance
EN=0V
Over-temperature Shutdown
Shutdown Hysteresis
Min.
2.7
2.45
-2.5
0.6045
2.2
85
1.2
Typ.
2.55
75
22
0.01
0.62
1
3.3
0.3
0.3
0.7
0.20
0.19
3
320
2.7
91
7
68
165
0.1
165
160
20
Max.
5.5
2.65
45
5
+2.5
0.6355
Units
V
V
mV
µA
µA
%
V
nA
A
%/V
%
%
Ω
MHz
µs
µA
95
%
%
µs
Ω
0.5
V
V
2
µA
Ω
°C
°C
April 2011
3
M9999-041811-A
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