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MCP1631VHV Datasheet(PDF) 7 Page - Microchip Technology

Part # MCP1631VHV
Description  High-Speed, Pulse Width Modulator
Download  34 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP1631VHV Datasheet(HTML) 7 Page - Microchip Technology

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© 2008 Microchip Technology Inc.
DS22063B-page 7
MCP1631/HV/MCP1631V/VHV
VS Amplifier PSRR
PSRR
65
dB
VIN = 3.0V to 5.0V, VCM =1.2V
Common Mode Input Range
VCM
GND
AVDD
V
Rail to Rail Input
Closed-loop Voltage Gain
A3VCL
—1
V/V
RL =5kΩ to VIN/2,
100 mV < VEAOUT < VIN - 100 mV,
VCM =1.2V
Low-level Output
VOL
38
GND + 85
mV
RL = 5 kΩ to VIN/2
VS Amplifier Sink Current
ISINK
15
mA
VS Amplifier Source Current
ISOURCE
-2
-5
mA
Peak Current Sense Input (C1)
Maximum Current Sense Signal
MCP1631/MCP1631HV
VCS_MAX
0.85
0.9
0.98
V
Maximum Ramp Signal
MCP1631V/MCP1631VHV
VRAMP
2.7
2.78
2.9
V
VIN > 4V
Maximum CS input range limited
by comparator input common
mode range. VCS_MAX =VIN-1.4V
Current Sense Input Bias Current
ICS_B
—-0.1
µA
VIN =5V
Delay From CS to VEXT
MCP1631
TCS_VEXT
—8.5
25
ns
Note 1
Minimum Duty Cycle
DCMIN
——
0
%
VFB =VREF +0.1V,
VCS =GND
Overvoltage Sense Comparator (C2)
OV Reference Voltage High
OV_VREF_H
—1.23
V
OV Reference Voltage Low
OV_VREF_L
1.15
1.18
1.23
V
OV Hysteresis
OV_HYS
50
mV
Overvoltage Comparator
Hysteresis
OV_IN Bias Current
OV_IBIAS
—0.001
1
µA
Delay From OV to VEXT
TOV_VEXT
63
150
ns
Delay from OV detection to PWM
termination (Note 1)
OV Input Capacitance
C_OV
—5
pF
Internal Regulator HV Options Input / Output Characteristics
Input Operating Voltage
VIN
3.5
16.0
V
Note 2
Maximum Output Current
IOUT_mA
250
mA
Output Short Circuit Current
IOUT_SC
400
mA
VIN = VIN(MIN) (Note 2),
VOUT = GND,
Current (average current)
measured 10 ms after short is
applied.
Output Voltage Regulation
VOUT
VR-3.0%
VR±0.4% VR+3.0%
V
VR = 3.3V or 5.0V
VOUT Temperature Coefficient
TCVOUT
50
150
ppm/
°C
Note 3
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise noted, VIN = 3.0V to 5.5V, FOSC = 1 MHz with 10% Duty Cycle, CIN = 0.1 µF,
VDD for typical values = 5.0V, TA for typical values = +25°C, TA = -40°C to +125°C for all minimum and maximums.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Note 1:
External Oscillator Input (OSCIN) rise and fall times between 10 ns and 10 µs were determined during device
characterization testing. Signal levels between 0.8V and 2.0V with rise and fall times measured between 10% and 90%
of maximum and minimum values. Not production tested. Additional timing specifications were fully characterized and
specified that are not production tested.
2:
The minimum VIN must meet two conditions: VIN ≥ 3.5V and VIN ≥ (VOUT(MAX) + VDROPOUT(MAX)).
3:
TCVOUT = (VOUT-HIGH - VOUT-LOW) *106 / (VR * ΔTemperature), VOUT-HIGH = highest voltage measured over the
temperature range. VOUT-LOW = lowest voltage measured over the temperature range.
4:
Load regulation is measured at a constant junction temperature using low duty cycle pulse testing. Changes in output
voltage due to heating effects are determined using thermal regulation specification TCVOUT.
5:
Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its measured
value with an applied input voltage of VOUT(MAX) + VDROPOUT(MAX) or 3.5V, whichever is greater.


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