MAX1981A Maxim Integrated Products, MAX1981A Datasheet - Page 8

• Manufacturer Part Number: MAX1981A
• Description: (MAX1907A / MAX1981A) Quick-PWM Master Controllers
• Manufacturer: Maxim Integrated Products

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Quick-PWM Master Controllers for Voltage-
Positioned CPU Core Power Supplies (IMVP-IV)
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = 15V, V
= 1.26V, ILIM = V
otherwise specified.)
8
Note 1: On-time specifications are measured from 50% to 50% at the DH pin, with LX forced to GND, BST forced to 5V, and a
Note 2: The output fault blanking time is measured from the time when FB reaches the regulation voltage set by the DAC code.
Note 3: Specifications to T
Output Voltage Swing
LOGIC AND I/O
DAC Input High Voltage
DAC Input Low Voltage
Four-Level Input Logic Levels
_______________________________________________________________________________________
500pF capacitor from DH to LX to simulate external MOSFET gate capacitance. Actual in-circuit times may be different due
to MOSFET switching speeds.
During power-up, the regulation voltage is set by the boot DAC code (B0–B2). During normal operation (SUS = low), the
regulation voltage is set by the VID DAC inputs (D0–D5). During suspend mode (SUS = high), the regulation voltage is set
by the suspend DAC inputs (S0–S2).
PARAMETER
CC
, SUS = D5 = D1= D0 = SO = S1 = S2 = B0 = GND, V
A
= -40°C to +100°C are guaranteed by design and are not production tested.
CC
= V
V
V
SYMBOL
DD
VID(HIGH)
VID(LOW)
= V
SHDN
|
R
D0–D5
D0–D5
TON, S0–S2, B0–B2
= V
V
L
OAIN+
= 1kΩ to V
TON
= V
– V
OAIN-
DPSLP
CC
CONDITIONS
/2
|
= V
≤ 10mV,
BI
D4
High
Open
REF
Low
= V
= V
OAIN
D3
V
V
CC
OL
- = 5V, V
= V
– V
D2
OH
= 1V, V
FB
= V
B2
V
CSP
CC
MIN
3.15
1.65
0.7
= 2V. T
= V
- 0.4
CSN
A
= -40°C to +100°C, unless
= V
OAIN+
MAX
3.85
2.35
300
200
0.3
0.5
= V
NEG
UNITS
= V
V
V
V
POS