Datasheet

© 2008 Microchip Technology Inc. DS22063B-page 7
MCP1631/HV/MCP1631V/VHV
VS Amplifier PSRR PSRR — 65 — dB V
IN
= 3.0V to 5.0V, V
CM
=1.2V
Common Mode Input Range V
CM
GND — AV
DD
V Rail to Rail Input
Closed-loop Voltage Gain A3
VCL
—1—V/VR
L
=5kΩ to V
IN
/2,
100 mV < V
EAOUT
< V
IN
- 100 mV,
V
CM
=1.2V
Low-level Output V
OL
— 38 GND + 85 mV RL = 5 kΩ to V
IN
/2
VS Amplifier Sink Current I
SINK
15—mA
VS Amplifier Source Current I
SOURCE
-2 -5 — mA
Peak Current Sense Input (C1)
Maximum Current Sense Signal
MCP1631/MCP1631HV
V
CS_MAX
0.85 0.9 0.98 V
Maximum Ramp Signal
MCP1631V/MCP1631VHV
V
RAMP
2.7 2.78 2.9 V V
IN
> 4V
Maximum CS input range limited
by comparator input common
mode range. V
CS_MAX
=V
IN
-1.4V
Current Sense Input Bias Current I
CS_B
—-0.1—µAV
IN
=5V
Delay From CS to V
EXT
MCP1631
T
CS_VEXT
—8.525nsNote 1
Minimum Duty Cycle DC
MIN
——0%V
FB
=V
REF
+0.1V,
V
CS
=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
—0.0011µA
Delay From OV to V
EXT
T
OV_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 V
IN
3.5 — 16.0 V Note 2
Maximum Output Current I
OUT_mA
250 — — mA
Output Short Circuit Current I
OUT_SC
— 400 — mA V
IN
= V
IN(MIN)
(Note 2),
V
OUT
= GND,
Current (average current)
measured 10 ms after short is
applied.
Output Voltage Regulation V
OUT
V
R
-3.0% V
R
±0.4% V
R
+3.0% V V
R
= 3.3V or 5.0V
V
OUT
Temperature Coefficient TCV
OUT
— 50 150 ppm/
°C
Note 3
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise noted, V
IN
= 3.0V to 5.5V, F
OSC
= 1 MHz with 10% Duty Cycle, C
IN
= 0.1 µF,
V
DD
for typical values = 5.0V, T
A
for typical values = +25°C, T
A
= -40°C to +125°C for all minimum and maximums.
Parameters Sym Min Typ Max Units Conditions
Note 1: External Oscillator Input (OSC
IN
) 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 V
IN
must meet two conditions: V
IN
≥ 3.5V and V
IN
≥ (V
OUT(MAX)
+ V
DROPOUT(MAX)
).
3: TCV
OUT
= (V
OUT-HIGH
- V
OUT-LOW
) *10
6
/ (V
R
* ΔTemperature), V
OUT-HIGH
= highest voltage measured over the
temperature range. V
OUT-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 TCV
OUT
.
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 V
OUT(MAX)
+ V
DROPOUT(MAX)
or 3.5V, whichever is greater.