Rainbow Electronics MAX1717 User Manual
Page 2
MAX1717
Dynamically Adjustable, Synchronous
Step-Down Controller for Notebook CPUs
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V+ = +15V, V
CC
= V
DD
= SKP/
SDN = +5V, V
OUT
= 1.6V, 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, A/B, VGATE, to GND ..................................-0.3V to +6V
SKP/SDN to GND ...................................................-0.3V to +16V
ILIM, FB, FBS, CC, REF, GNDS, 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
24-Pin QSOP (derate 9.5mW/°C above +70°C)..........762mW
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
V
CC
= 4.5V to 5.5V, no REF load
SKP/SDN = 0, V
CC
= V
DD
= 0 or 5V
SKP/SDN = 0
SKP/SDN = 0
V
CC
, V
DD
Measured at V
DD
, FB forced above the regulation point
Battery voltage, V+
Measured at V
CC
, FB forced above the regulation point
TON = GND (1000kHz)
TON = V
CC
, open, or REF (200kHz, 300kHz, or 550kHz)
38kHz nominal, R
TIME
= 470k
Ω
380kHz nominal, R
TIME
= 47k
Ω
150kHz nominal, R
TIME
= 120k
Ω
TON = V
CC
(200kHz)
FB to FBS or GNDS to GND = 0 to 25mV
V
CC
= 4.5V to 5.5V, V
BATT
= 4.5V to 28V
V+ = 24V, FB = 2V
V+ = 5V, FB = 2V, TON = GND (1000kHz)
CONDITIONS
V
1.98
2
2.02
DAC codes from 1.3V to 2V
Reference Voltage
µA
<1
5
%
Shutdown Battery Supply
Current (V+)
µA
<1
5
-1
1
Shutdown Supply Current (V
DD
)
µA
2
5
Shutdown Supply Current (V
CC
)
µA
25
40
DAC codes from 0.925V to 1.275V
Quiescent Battery Supply
Current (V+)
µA
<1
5
-1.2
1.2
Quiescent Supply Current (V
DD
)
µA
700
1200
TON = open (300kHz)
Quiescent Supply Current (V
CC
)
ns
300
375
TON = REF (550kHz)
Minimum Off-Time (Note 2)
ns
400
500
Minimum Off-Time (Note 2)
375
418
461
260
289
318
135
155
173
ns
375
425
475
On-Time (Note 2)
4.5
5.5
V
2
28
Input Voltage Range
-12
+12
%
-12
+12
-8
+8
TIME Frequency Accuracy
µA
-1
1
GNDS Input Bias Current
mV
3
Remote Sense Voltage Error
mV
5
Line Regulation Error
k
Ω
115
180
265
FB Input Resistance
UNITS
MIN
TYP
MAX
PARAMETER
µA
-0.2
0.2
FBS Input Bias Current
%
V+ = 4.5V to 28V,
includes load
regulation error
DC Output Voltage Accuracy
(Note 1)
PWM CONTROLLER
BIAS AND REFERENCE