MAX17480
AMD 2-/3-Output Mobile Serial
VID Controller
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 2, V
IN
= 12V, V
CC
= V
DD
= V
IN3
= SHDN = PGD_IN = 5V, V
DDIO
= 1.8V, OPTION = GNDS_ = AGND = PGND,
FBDC_ = FBAC_ = OUT3 = CSP_ = CSN_ = 1.2V, all DAC codes set to the 1.2V code, T
A
= 0°C to +85°C, unless otherwise noted.
Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Combined-Mode Detection
Threshold
GNDS1, GNDS2, detection after REFOK,
latched, cleared by cycling SHDN
0.7 0.8 0.9 V
Maximum Duty Factor D
MAX
90 92 %
Minimum On-Time t
ONMIN
150 ns
SMPS1 AND SMPS2 CURRENT LIMIT
Current-Limit Threshold
Tolerance
V
LIMIT
V
CSP
_ - V
CSN
_ = 0.052 x (V
REF
- V
ILIM
),
(V
REF
- V
ILM
) = 0.2V to 1.0V
-3 +3 mV
Zero-Crossing Threshold V
ZX
V
GND
_ - V
LX
_, skip mode 1 mV
Idle Mode™ Threshold
V
IMIN
V
CSP
_ - V
CSN
_, skip mode, 0.15 x V
LIMIT
-2 +2 mV
CS_ Input Leakage Current CSP_ and CSN_, T
A
= +25°C -0.2 +0.2 µA
CS_ Common-Mode Input Range CSP_ and CSN_ 0 2 V
SMPS1 AND SMPS2 DROOP, CURRENT BALANCE, AND TRANSIENT RESPONSE
AC Droop and Current Balance
Amplifier Transconductance
G
m(FBAC
_
)
I
FBAC
_/(V
CS
_), V
FBAC
_ = V
CSN
_ = 1.2V,
V
CSP
_ - V
CSN
_ = 0 to +40mV
1.94 2.00 2.06 mS
AC Droop and Current Balance
Amplifier Offset
I
FBAC
_/G
m(FBAC
_
)
-1.5 +1.5 mV
No-Load Positive Offset OPTION = 2V or GND +12.5 mV
Transient Detection Threshold
Measured at FBDC_ with respect to
steady-state FBDC_ regulation voltage,
10mV hysteresis (typ)
-47 -41 -33 mV
SMPS3 INTERNAL 4A STEP-DOWN CONVERTER
OUT3 Load Regulation R
DROOP3
4 5.5 7 mV/A
OUT3 Line Regulation 0 to 100% duty cycle 5 mV
OUT3 Input Current I
OUT3
T
A
= +25°C -100 -5 +100 nA
LX3 Leakage Current I
LX3
SHDN = GND, V
LX3
= GND or 5.5V,
V
IN3
= 5.5V, T
A
= +25°C
-20 +20 µA
R
ON(NH3)
High-side n-channel 75 150
Internal MOSFET On-Resistance
R
ON(NL3)
Low-side n-channel 40 75
m
ILIM3 = V
CC
4.75 5.25 6
LX3 Peak Current Limit I
LX3PK
ILIM3 = GND 3.75 4.25 5
A
LX3 Idle-Mode Trip Level I
LX3MIN
Percentage of I
LX3PK
25 %
LX3 Zero-Crossing Trip Level I
ZX3
Skip mode 20 mA
Maximum Duty Factor D
MAX
84 87 %
Minimum On-Time t
ONMIN
150 ns
Idle Mode is a trademark of Maxim Integrated Products, Inc.
(13 Seiten)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Kommentare zu diesen Handbüchern