MAX1981A Maxim Integrated Products, MAX1981A Datasheet - Page 4

• 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.)
4
IMVPOK, CLKEN Threshold
CLKEN Delay
IMVPOK, CLKEN Transition
Blanking Time
IMVPOK Delay
IMVPOK, CLKEN, Output Low
Voltage
IMVPOK, CLKEN, Leakage
Current
V
Lockout Threshold
Thermal Shutdown Threshold
CURRENT LIMIT
Current-Limit Threshold Voltage
(Positive, Default)
Current-Limit Threshold Voltage
(Positive, Adjustable)
Current-Limit Threshold Voltage
(Negative)
Current-Limit Threshold Voltage
(Zero Crossing)
CSP, CSN Input Ranges
CSP, CSN Input Current
ILIM Input Current
Current-Limit Default
Switchover Threshold
GATE DRIVERS
DH Gate-Driver On-Resistance
DL Gate-Driver On-Resistance
DH Gate-Driver Source/Sink
Current
DL Gate-Driver Sink Current
CC
_______________________________________________________________________________________
Undervoltage
PARAMETER
CC
, SUS = D5 = D1= D0= S0 = S1 = S2 = B0 = GND, V
CC
= V
V
DD
SYMBOL
UVLO(VCC)
R
t
R
t
IMVPOK
CLKEN
ON(DH)
ON(DL)
= V
SHDN
SYSPOK = V
measured at FB with
respect to unloaded
output voltage
FB in regulation, measured from the rising
edge of SYSPOK
Measured from the time when FB reaches
the voltage set by the DAC code, clock
speed set by R
FB in regulation, measured from the falling
edge of CLKEN
I
High state, IMPOK, CLKEN forced to 5.5V
Rising edge, hysteresis = 20mV,
PWM disabled below this level
Hysteresis = 10°C
CSP - CSN, ILIM = V
CSP - CSN
CSP - CSN; ILIM = V
DPSLP = V
GND - LX; SUS = V
V
V
ILIM
BST - LX forced to 5V
High state (pullup)
Low state (pulldown)
DH forced to 2.5V, BST - LX forced to 5V
DL forced to 2.5V
= V
SINK
CSP
ILIM
TON
= 3mA
= V
= 0 to 5V
= V
CSN
CC
DPSLP
CC
= 0 to 5V
CONDITIONS
TIME
;
= V
CC
CC
CC
BI
or DPSLP = GND
Lower threshold
(undervoltage)
Upper threshold
(overvoltage)
V
V
, SUS = GND and
= V
D4
ILIM
ILIM
OAIN
= V
= 0.3V
= 1V
D3
- = 5V, V
= V
D2
FB
= 1V, V
= V
CSP
MIN
B2
-12
-68
4.0
30
47
27
97
-1
8
3
0
3
= V
= 2V. T
CSN
V
CC
TYP
0.01
160
100
-10
-63
1.2
1.2
0.5
1.6
10
50
32
50
30
A
= V
5
4
4
- 1 V
= 0°C to +85°C, unless
OAIN+
CC
MAX
103
200
-58
0.3
4.4
4.0
4.0
1.5
+1
12
90
53
33
-8
7
1
2
= V
- 0.4
NEG
UNITS
= V
clks
mV
mV
mV
mV
ms
µA
µA
nA
µs
°C
%
Ω
Ω
A
A
V
V
V
V
POS