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MIC2127A Datasheet(PDF) 4 Page - Microchip Technology

Part # MIC2127A
Description  75V, Synchronous Buck Controller Featuring Adaptive On-Time Control
PDF  38 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MIC2127A Datasheet(HTML) 4 Page - Microchip Technology

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MIC2127A
DS20005676B-page 4
 2016 Microchip Technology Inc.
ELECTRICAL CHARACTERISTICS (Note 1)
Electrical Specifications:
unless otherwise specified, VIN =12V, VOUT = 1.2V; VBST –VSW =5V, TA =+25°C.
Boldface
values indicate –40°C
 TJ  +125°C (Note 2).
Parameter
Symbol
Min.
Typ.
Max.
Units
Test Conditions
Power Supply Input
Input Voltage Range
VVIN
4.5
—
5.5
VPVDD and VDD shorted to VIN
(VPVDD =VVIN =VVDD)
5.5
—
75
Quiescent Supply Current
IQ
—1.4
1.8
mA
VFB = 1.5V, MODE = VDD,
no switching
—300
600
µA
VFB = 1.5V, MODE = AGND,
no switching
Shutdown Supply Current
IVIN(SHDN)
—0.1
5
µA
EN = Low
—30
60
µA
EN = Low, VIN =VDD =5.5V
PVDD,VDD and EXTVDD
PVDD Output Voltage
VPVDD
4.8
5.1
5.4
VVVIN = 7V to 75V,
IPVDD =10mA
VDD UVLO Threshold
VVDD_UVLO_Rise
3.7
4.2
4.5
VVDD rising
VDD UVLO Hysteresis
VVDD_UVLO_Hys
—600
—
mV
VDD falling
EXTVDD Bypass Threshold
VEXTVDD_Rise
4.4
4.6
4.85
V
EXTVDD rising
EXTVDD Bypass Hysteresis
VEXTVDD_Hys
—200
—
mV
EXTVDD Dropout Voltage
—
250
—
mV
VEXTVDD =5V, IPVDD =25mA
Reference
Feedback Reference Voltage
VREF
0.597
0.6
0.603
V
TJ = 25°C
0.594
0.6
0.606
V
–40°C
 TJ 125°C
FB Bias Current (Note 3)IFB
—50
500
nA
VFB = 0.6V
Enable Control
EN Logic Level High
VEN_H
1.6
——
V
EN Logic Level Low
VEN_L
——
0.6
V
EN Hysteresis
VEN_Hys
—100
—
mV
EN Bias Current
IEN
—6
30
µA
VEN =12V
ON Timer
Switching Frequency
f0
—800
—
kHz
VFREQ =VVIN, VVIN =12V
230
270
300
VFREQ = 33% of VVIN,
VVIN =12V
Maximum Duty Cycle
DMAX
—85
—
%
VFREQ =VVIN = 12V
Minimum Duty Cycle
DMIN
—0
—
%
VFB > 0.6V
Minimum ON Time
tON(MIN)
—80
—
ns
Minimum OFF Time
tOFF(MIN)
150
230
350
ns
MODE
MODE Logic High Level
VMODE_H
1.6
——
V
MODE Logic Low Level
VMODE_L
——
0.6
V
MODE Hysteresis
VMODE_Hys
—70
—
mV
Note 1:
Specification for packaged product only.
2:
The application is fully functional at low VDD (supply of the control section) if the external MOSFETs have
low voltage VTH.
3:
Design specification.



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