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| MIC26603 Datasheet, PDF (4/30 Pages) Micrel Semiconductor – 28V, 6A Hyper Light Load Synchronous DC/DC Buck Regulator | |||
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Micrel, Inc.
MIC26603
Absolute Maximum Ratings(1,2)
PVIN to PGND................................................ â0.3V to +29V
VIN to PGND ....................................................â0.3V to PVIN
PVDD, VDD to PGND ......................................... â0.3V to +6V
VSW, VCS to PGND .............................. â0.3V to (PVIN +0.3V)
VBST to VSW ........................................................ â0.3V to 6V
VBST to PGND .................................................. â0.3V to 35V
VFB, VPG to PGND............................... â0.3V to (VDD + 0.3V)
VEN to PGND ........................................ â0.3V to (VIN +0.3V)
PGND to SGND ........................................... 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 (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) ........................ â40°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 â 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 Rising
3.7
4.2
VDD UVLO Hysteresis
400
Dropout Voltage (VIN â VDD)
IDD = 25mA
380
DC/DC Controller
Output-Voltage Adjust Range
(VOUT)
0.8
Reference
Load Regulation
Line Regulation
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
0°C ⤠TJ ⤠85°C (±1.0%)
â40°C ⤠TJ ⤠125°C (±1.5%)
IOUT = 1A to 6A (Continuous Mode)
VIN = 4.5V to 28V
VFB = 0.8V
VEN = 12V
VFB = 0V
VFB = 1.0V
0.792
0.8
0.788
0.8
0.25
0.25
50
1.8
6
450
600
82
0
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
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