Rainbow Electronics MAX8707 - Manual (Page 5)

MAX8707
Multiphase, Fixed-Frequency Controller for
AMD Hammer CPU Core Power Supplies
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ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. V CC = V SHDN = 5V, OSC = REF, V VPS = V FBS = V CRSN = V CRSP = V CSP_ = 1.20V, V SUSV = 0.8V, OFS = SUS =
GNDS = PGND = SKIP = GND, D0–D4 set for 1.20V (D0–D4 = 01110). T A = 0°C to +85°C, unless otherwise specified. Typical values
are at T A = +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ILIM(PK) Idle Current-Limit
Threshold Voltage (Skip Mode)
V IDLE
C S P _ - C S N _, V S KI P
≥ 1.2V ,
R I LI M ( P K ) = R T RC x 8V / V P KL IM IT ,
V P KL IM IT = 50m V
2 5 8 mV
CSP_, CRSP -0.2 +0.2
Current-Sense Input Current
CSN_, CRSN -1.0 +1.0
µA
Current-Sense Common-Mode
Input Range
CRSP, CRSN, CSP_, CSN_ 0 2 V
Phase Disable Threshold CSP4 3 V
CC
- 1
V CC -
0.4
V
CRS Sense Input Disable
Threshold
CRSP 3 V CC - 1
V CC -
0.4
V
LOGIC AND I/O
Logic Input High Voltage V IH
SHDN, SUS 2.4 V
Logic Input Low Voltage V IL
SHDN, SUS 0.8 V
SHDN No-Fault Threshold To enable no-fault mode 11 13 V
D0–D4 Logic Input High Voltage 0.8 V
D0–D4 Logic Input Low Voltage 0.4 V
High (V CC )
V CC -
0.4
Medium (REF) 1.8 2.2
OSC 3-Level Input Logic Levels V OSC
Low (GND) 0.4
V
High 1.2
SKIP Input Logic Levels V SKIP
Low (GND) 0.8
V
Logic Input Current SHDN, SKIP, SUS, OSC, D0–D4 = 0 to 5V -1 +1 µA
Logic Output High Voltage V OH PWM_, DRSKP; I SOURCE = 3mA
V CC -
0.4
V
Logic Output Low Voltage V OL PWM_, DRSKP; I SINK = 3mA 0.4 V