English
Language : 

MIC261203 Datasheet, PDF (4/31 Pages) Micrel Semiconductor – 28V, 12A Hyper Light Load™ Synchronous DC/DC Buck Regulator
◁
Micrel, Inc.
MIC261203
Absolute Maximum Ratings(1,2)
PVIN to PGND................................................ –0.3V to +29V
VIN to PGND ....................................................–0.3V to PVIN
PVDD, VDD to PGND ......................................... –0.3V to +6V
VSW, VCS to PGND .............................. –0.3V to (PVIN +0.3V)
VBST to VSW ........................................................ –0.3V to 6V
VBST to PGND .................................................. –0.3V to 35V
VFB, VPG to PGND............................... –0.3V to (VDD + 0.3V)
VEN to PGND ........................................ –0.3V to (VIN +0.3V)
PGND to SGND ........................................... –0.3V to +0.3V
Junction Temperature .............................................. +150°C
Storage Temperature (TS).........................–65°C to +150°C
Lead Temperature (soldering, 10sec)........................ 260°C
Operating Ratings(3)
Supply Voltage (PVIN, VIN)............................... 4.5V to 28V
PVDD, VDD Supply Voltage (PVDD, VDD)......... 4.5V to 5.5V
Enable Input (VEN) .................................................. 0V to VIN
Junction Temperature (TJ) ........................ –40°C to +125°C
Maximum Power Dissipation......................................Note 4
Package Thermal Resistance(4)
5mm x 6mm MLF®-24L (θJA) .............................28°C/W
Electrical Characteristics(5)
PVIN = VIN = VEN = 12V, VBST – VSW = 5V; TA = 25°C, unless noted. Bold values indicate –40°C ≤ TJ ≤ +125°C.
Parameter
Condition
Min.
Typ.
Power Supply Input
Input Voltage Range (VIN, PVIN)
4.5
Quiescent Supply Current
VFB = 1.5V (non-switching)
450
Shutdown Supply Current
VEN = 0V
5
VDD Supply Voltage
VDD Output Voltage
VIN = 7V to 28V, IDD = 40mA
4.8
5
VDD UVLO Threshold
VDD UVLO Hysteresis
VDD Rising
3.7
4.2
400
Dropout Voltage (VIN – VDD)
IDD = 25mA
380
DC/DC Controller
Output-Voltage Adjust Range
(VOUT)
0.8
Reference
0°C ≤ TJ ≤ 85°C (±1.0%)
0.792
0.8
–40°C ≤ TJ ≤ 125°C (±1.5%)
0.788
0.8
Load Regulation
Line Regulation
IOUT = 3A to 12A (Continuous Mode)
VIN = 4.5V to 28V
0.25
0.25
FB Bias Current
VFB = 0.8V
50
Enable Control
EN Logic Level High
1.8
EN Logic Level Low
EN Bias Current
Oscillator
Switching Frequency (6)
Maximum Duty Cycle (7)
VEN = 12V
VFB = 0V
6
450
600
82
Minimum Duty Cycle
VFB = 1.0V
0
Minimum Off-Time
300
Max.
28
750
10
5.4
4.5
600
5.5
0.808
0.812
500
0.6
30
750
Units
V
µA
µA
V
V
mV
mV
V
V
%
%
nA
V
V
µA
kHz
%
%
ns
July 2011
4
M9999-071311-A
 ▷