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| MIC2176 Datasheet, PDF (4/31 Pages) Micrel Semiconductor – Wide Input Voltage, Synchronous Buck | |||
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Micrel, Inc.
MIC2176
Absolute Maximum Ratings(1, 2)
VHSD to PGND................................................ â0.3V to +76V
VDD to PGND ................................................... â0.3V to +6V
VSW to PGND......................................â0.3V to (VHSD +0.3V)
VBST to VSW ........................................................ â0.3V to 6V
VBST to PGND .................................................. â0.3V to 82V
VEN to PGND ...................................... â0.3V to (VDD + 0.3V)
VFB to PGND....................................... â0.3V to (VDD + 0.3V)
PGND to GND .............................................. â0.3V to +0.3V
Junction Temperature .............................................. +150°C
Storage Temperature (TS).........................â65°C to +150°C
Lead Temperature (soldering, 10sec)........................ 260°C
Operating Ratings(3)
Supply Voltage (VHSD) ....................................... 4.5V to 75V
Bias Voltage (VDD)............................................ 4.5V to 5.5V
Enable Input (VEN) ................................................. 0V to VDD
Junction Temperature (TJ) ........................ â40°C to +125°C
Junction Thermal Resistance
MSOP (θJA) ..................................................130.5°C/W
Continuous Power Dissipation
(derate 5.6mW/°C above 70°C)
(TA = 70°C) ........................................................421mW
ESD (Human Body Mode) .......................................... 1.5kV
Electrical Characteristics(4)
VIN = VHSD = 48V, VDD = 5V; VBST â VSW = 5V; TA = 25°C, unless noted. Bold values indicate â40°C ⤠TJ ⤠+125°C.
Parameter
Condition
Min.
Typ.
Power Supply Input
HSD Voltage Range (VHSD)(5)
VDD Bias Voltage
Operating Bias Voltage (VDD)
Undervoltage Lockout Trip Level
UVLO Hysteresis
Quiescent Supply Current
Shutdown Supply Current
Reference
Feedback Reference Voltage
FB Bias Current
Enable Control
EN Logic Level High
EN Logic Level Low
EN Bias Current
Oscillator
Switching Frequency (6)
Maximum Duty Cycle (7)
Minimum Duty Cycle
Minimum Off-Time
Minimum On-Time
VDD Rising
VFB = 1.5V
SW = unconnected, VEN = 0V
0°C ⤠TJ ⤠85°C (±1.0%)
-40°C ⤠TJ ⤠125°C (±1.5%)
VFB = 0.8V
4.5V < VDD < 5.5V
4.5V < VDD < 5.5V
VEN = 0V
MIC2176-1
MIC2176-2
MIC2176-3
MIC2176-1, VFB = 0V, HSD=4V, VO = 3.3V
MIC2176-2, VFB = 0V, HSD=4V, VO = 3.3V
MIC2176-3, VFB = 0V, HSD=4V, VO = 3.3V
VFB > 0.8V
4.5
4.5
5
3.2
3.85
370
1.4
0.7
0.792
0.8
0.788
0.8
5
1.2
0.85
0.78
50
75
100
150
200
225
300
96
93
89
0
360
60
Max.
75
5.5
4.45
3
2
0.808
0.812
500
0.4
100
125
250
375
Units
V
V
V
mV
mA
mA
V
nA
V
V
µA
kHz
%
%
ns
ns
November 2010
4
M9999-111710-A
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