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MIC24420 Datasheet(PDF) 4 Page - Micrel Semiconductor

Part No. MIC24420
Description  2.5A Dual Output PWM Synchronous Buck Regulator IC
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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MIC24420 Datasheet(HTML) 4 Page - Micrel Semiconductor

 
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Micrel, Inc.
MIC24420/MIC24421
June 2012
4
M9999-062012-C
Absolute Maximum Ratings
(1)
VIN to PGND .................................................... –0.3V to 16V
VIND1, VIND2 to PGND........................................ –0.3V to 16V
VDD to PGND ..................................................... –0.3V to 6V
VSW1, VSW2 to PGND ............................ –0.7V to (VIN + 0.3V)
VCS1, VCS2 to PGND ............................. –0.7V to (VIN + 0.3V)
VBST1 to VSW1, VBST2 to VSW2............................... –0.3V to 6V
VBST1, VBST2 to PGND................................. –0.3V to VSW+6V
VEN/DLY, VCOMP, VFB, VPG to PGND ....–0.7V to (VAVDD + 0.3V)
PGND1, PGND2 to AGND ........................... –0.3V to +0.3V
Junction Temperature ................................................ 150°C
Storage Temperature ...............................–65
°C to +150°C
Lead Temperature (soldering, 10 sec.)...................... 260°C
ESD Rating
(3) ................................................ ESD Sensitive
Operating Ratings
(2)
Supply Voltage (VIN)...................................... +4.5V to +15V
Output Voltage Range (VOUT)……………......0.7V to 0.7*VIN
Maximum Output Current (IOUT)…………….. ................2.5A
Junction Temperature (TJ) ........................–40°C to +125°C
Junction Thermal Resistance
4mmx4mm MLF-24L (
θJC) .................................14°C/W
4mmx4mm MLF-24L (
θJA) .................................35°C/W
Electrical Characteristics
(4)
VIN = 12V; VEN=5V; VOUT=1.8V; ILOAD=10mA; TA = 25°C, bold values indicate –40°C≤ TJ ≤ +125°C, unless noted.
Parameter
Condition
Min
Typ
Max
Units
Power Input Supply
Input Voltage Range (VIN)
4.5
15
V
Quiescent Supply Current
VFB = 0.8V, IOUT = 0A; Both outputs not switching
2.6
7
mA
Shutdown Current
VEN1 = VEN2 = 0V
25
50
µA
VIN UVLO Turn-On Threshold
VIN Rising, VDD = VIN
3.6
4.1
4.45
V
VIN UVLO Hysteresis
VDD = VIN
400
mV
VDD Supply
Internal Bias Voltages AVDD
VFB = 0.8V, IAVDD = 50mA
4.7
5.1
5.45
V
Reference (Each Channel)
Feedback Reference Voltage
686
700
714
mV
FB Bias Current
VFB = 0.7V
5
nA
FB Line Regulation
VIN = 6V to 15V, IOU T = 10mA
0.005
%/V
Output Voltage Line Regulation
VIN = 6V to 15V , VOUT = 1.8V, IOU T = 1A; each channel
0.005
%/V
Output Voltage Load Regulation
VOUT = 1.8V, IOU T = 0A to 2A; each channel
0.15
%
Output Voltage Total Regulation
VIN = 6V to 15V , IOU T = 0.25A to 2A, VOUT = 1.8V ; each
channel
0.1
%
External Current Sense, Adjustable
Current Limit Trip Point Current
Sourcing current
175
200
225
µA
Current Limit Temperature
Coefficient
TJ = -40°C to 125°C
750
ppm/°C
Current Limit Comparator Offset
-20
0
10
mV


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