MAX1717 Maxim, MAX1717 Datasheet - Page 3

• Manufacturer Part Number: MAX1717
• Description: Dynamically Adjustable / Synchronous Step-Down Controller for Notebook CPUs
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = +15V, V
FAULT PROTECTION
GATE DRIVERS
Reference Load Regulation
REF Sink Current
Overvoltage Trip Threshold
Overvoltage Fault Propagation
Delay
Output Undervoltage Fault
Protection Threshold
Output Undervoltage Fault
Propagation Delay
Output Undervoltage Fault
Blanking Time
Current-Limit Threshold
(Positive, Default)
Current-Limit Threshold
(Positive, Adjustable)
Current-Limit Threshold
(Negative)
Current-Limit Threshold
(Zero Crossing)
Current-Limit Default
Switchover Threshold
Thermal Shutdown Threshold
V
Threshold
VGATE Lower Trip Threshold
VGATE Upper Trip Threshold
VGATE Propagation Delay
VGATE Transition Delay
VGATE Output Low Voltage
VGATE Leakage Current
DH Gate Driver On-Resistance
DL Gate Driver On-Resistance
DH Gate-Driver Source/Sink
Current
DL Gate-Driver Sink Current
CC
Undervoltage Lockout
PARAMETER
Step-Down Controller for Notebook CPUs
_______________________________________________________________________________________
Dynamically Adjustable, Synchronous
CC
I
REF in regulation
Measured at FB
FB forced 2% above trip threshold
With respect to unloaded output voltage
FB forced 2% below trip threshold
From SKP/SDN signal going high, clock speed set by R
GND - LX, ILIM = V
GND - LX
LX - GND, ILIM = V
GND - LX
Hysteresis = 10°C
Rising edge, hysteresis = 20mV, PWM disabled below
this level
Measured at FB with respect to unloaded output voltage,
rising edge, hysteresis = 1%
Measured at FB with respect to unloaded output voltage,
rising edge, hysteresis = 1%
FB forced 2% outside VGATE trip threshold
After X = Y, clock speed set by R
I
High state, forced to 5.5V
BST - LX forced to 5V
DL, high state (pull up)
DL, low state (pull down)
DH forced to 2.5V, BST - LX forced to 5V
DL forced to 2.5V
= V
REF
SINK
DD
= 0 to 50µA
= 1mA
= SKP/SDN = +5V, V
CC
CC
CONDITIONS
OUT
T
T
ILIM = 0.5V
ILIM = REF (2V)
A
A
= 1.6V, T
= +25°C to +85°C
= 0°C to +85°C
TIME
A
= 0°C to +85°C, unless otherwise noted.)
TIME
-140
2.20
MIN
+10
165
4.1
10
65
90
85
35
-8
3
V
CC
TYP
2.25
-110
+12
256
100
200
150
-6.5
1.5
1.5
1.0
1.0
0.4
1.3
70
10
50
4
1
4
- 1 V
CC
MAX
0.01
2.30
+14
110
115
230
-80
4.4
0.4
3.5
3.5
1.0
75
65
-5
- 0.4
1
UNITS
clks
mV
mV
mV
mV
ms
clk
µA
°C
µA
µs
µs
%
%
%
Ω
Ω
V
V
V
V
V
A
A
3