Rainbow Electronics MAX1718 User Manual
Page 2
MAX1718
Notebook CPU Step-Down Controller for Intel
Mobile Voltage Positioning (IMVP-II)
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V+ = 15V, V
CC
= V
DD
= SKP/SDN = 5V, V
OUT
= 1.25V, T
A
= 0°C to +85°C, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V+ to GND ..............................................................-0.3V to +30V
V
CC
, V
DD
to GND .....................................................-0.3V to +6V
D0–D4, ZMODE, VGATE, OVP, SUS, to GND .........-0.3V to +6V
SKP/SDN to GND ...................................................-0.3V to +16V
ILIM, CC, REF, POS, NEG, S1, S0,
TON, TIME to GND .................................-0.3V to (V
CC
+ 0.3V)
DL to GND ..................................................-0.3V to (V
DD
+ 0.3V)
BST to GND ............................................................-0.3V to +36V
DH to LX .....................................................-0.3V to (BST + 0.3V)
LX to BST..................................................................-6V to +0.3V
REF Short Circuit to GND ...........................................Continuous
Continuous Power Dissipation
28-Pin QSOP (derate 10.8mW/°C above +70°C).........860mW
Operating Temperature Range ..........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature.........................................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
2
28
4.5
5.5
Battery voltage, V+
V
CC
, V
DD
Input Voltage Range
DC Output Voltage Accuracy
V+ = 4.5V to 28V,
includes load
regulation error
DAC codes from 0.9V to 1.75V
DAC codes from 0.6V to 0.875V
-1
+1
-1.5
+1.5
%
%
Line Regulation Error
V
CC
= 4.5V to 5.5V, V
BATT
= 4.5V to 28V
5
mV
Input Bias Current
FB, POS, NEG
-0.2
+0.2
µA
V
0.4
2.5
POS, NEG Common-Mode Range
TIME Frequency Accuracy
150kHz nominal, R
TIME
= 120k
Ω
380kHz nominal, R
TIME
= 47k
Ω
38kHz nominal, R
TIME
= 470k
Ω
V+ = 5V, FB = 1.2V, TON = GND (1000kHz)
-8
+8
-12
+12
-12
+12
230
260
290
%
ns
165
190
215
320
355
390
465
515
565
TON = REF (550kHz)
TON = open (300kHz)
TON = V
CC
(200kHz)
V+ = 12V, FB = 1.2V
On-Time (Note 1)
Minimum Off-Time (Note 1)
TON = V
CC
, open, or REF (200kHz, 300kHz, or 550kHz)
TON = GND (1000kHz)
400
500
300
375
ns
µA
700
1200
Measured at V
CC
, FB forced above the regulation point
Quiescent Supply Current (V
CC
)
Quiescent Supply Current (V
DD
)
Measured at V
DD
, FB forced above the regulation point
<1
5
µA
µA
25
40
Quiescent Battery Supply
Current (V+)
Shutdown Supply Current (V
CC
)
Shutdown Supply Current (V
DD
)
SKP/SDN = GND
SKP/SDN = GND
2
5
<1
5
µA
µA
µA
<1
5
SKP/SDN = GND, V
CC
= V
DD
= 0V or 5V
Shutdown Battery Supply
Current (V+)
Reference Voltage
V
CC
= 4.5V to 5.5V, no REF load
1.98
2
2.02
V
mV
-80
+80
POS - NEG
POS, NEG Differential Range
V/V
0.81
0.86
0.91
∆V
FB
/ (POS - NEG); POS - NEG = 50mV
POS, NEG Offset Gain
PWM CONTROLLER
BIAS AND REFERENCE