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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX17007 Datasheet

Dual and Combinable QPWM Graphics Core Controllers

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19-3200; Rev 0; 2/08
EVAALVUAAILTAIOBNLEKIT
Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
General Description
The MAX17007/MAX17008 are dual Quick-PWM™ step-
down controllers intended for general power generation
in battery-powered systems. The two switched-mode
power supplies (SMPSs) can also be combined to oper-
ate in a two-phase single-output mode. Constant on-
time Quick-PWM operation provides fast response to
load transients and handles wide input/output (I/O) volt-
age ratios with ease, while maintaining a relatively con-
stant switching frequency. The switching frequency can
be individually adjusted between 200kHz and 600kHz
with external resistors. Differential output current sens-
ing allows output sense-resistor sensing for an accurate
current limit, or lossless inductor direct-current resis-
tance (DCR) current sensing for lower power dissipation
while maintaining 0.7% output accuracy. Overvoltage
(MAX17007 only), undervoltage protection, and accu-
rate user-selectable current limits (15mV, 30mV, 45mV,
and 60mV) ensure robust operations.
The SMPS outputs can operate in skip mode or in ultra-
sonic mode for improved light-load efficiency. The ultra-
sonic mode eliminates audible noises by maintaining a
minimum switching frequency of 25kHz in pulse-
skipping mode.
The output voltage of SMPS1 can be dynamically
adjusted by changing the voltage at the REFIN1 pin.
The device includes a 0.5% accurate reference output
that can be used to set the REFIN1 voltage. An external
5V bias supply is required to power the internal circuitry
and its gate drivers.
Independent on/off controls with well-defined logic thresh-
olds and independent open-drain power-good outputs
provide flexible system configurations. To prevent current
surges at startup, the internal voltage target is slowly
ramped up from zero to the final target with a slew rate of
1.3mV/µs for SMPS1 at CSL1 and 0.65mV/µs for SMPS2
at FB2. To prevent the output from ringing off below
ground in shutdown, the internal voltage target is ramped
down from its previous value to zero with the same
respective slew rates. Integrated bootstrap switches
eliminate the need for external bootstrap diodes.
The MAX17007/MAX17008 are available in a space-
saving, 28-pin, 4mm x 4mm, thin QFN package with an
exposed backside pad.
Applications
Notebook Computers
5V and 3.3V Supplies
Low-Power I/O Supplies
GPU Core Supplies
2 to 4 Li+ Cells Battery-
Powered Devices
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
Features
o Dual Quick-PWM with Fast Transient Response
o Automatic Dynamic REFIN1 Detection and
PGOOD1/Fault Blanking
o Fixed and Adjustable Output Voltages
0.7% Output Accuracy Over Line and Load
OUT1: 0 to 2V Dynamic Output or Preset 1.05V
OUT2: 0.7V to 2V Range or Preset 1.5V
o Resistor-Programmable Switching Frequency
o Integrated BST Switches
o Differential Current-Sense Inputs
Low-Cost DCR Sensing or Accurate Current-
Sense Resistors
Internally Coupled Current-Sense Compensation
o Combinable Mode Supports High-Current
Dynamic Output Voltages
o Selectable Forced-PWM, Pulse Skip, or Ultrasonic
Mode Operation
o 26V Maximum Input Voltage Rating
o Independent Enable Inputs
o Independent Power-Good Outputs
o Overvoltage Protection (MAX17007 Only)
o Undervoltage/Thermal Protection
o Automatic Dynamic REFIN1 Detection and
PGOOD1/Fault Blanking
o Voltage Soft-Start and Soft-Shutdown
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX17007GTI+
-40°C to +105°C
28 Thin QFN
MAX17008GTI+*
-40°C to +105°C
28 Thin QFN
+Denotes a lead-free package.
*Future product—contact factory for availability.
Pin Configuration
TOP VIEW
21 20 19 18 17 16 15
LX2 22
DH2 23
14 LX1
12 DH1
PGOOD2 24
EN2 25
CSH2 26
MAX17007
MAX17008
12 PGOOD1
11 EN1
10 CSH1
CSL2 27
9 CSL1
FB2 28
8 REFIN1
+
1234567
THIN QFN
(4mm x 4mm)
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX17007 Datasheet

Dual and Combinable QPWM Graphics Core Controllers

No Preview Available !

Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
ABSOLUTE MAXIMUM RATINGS
BST1, BST2 to GND ...............................................-0.3V to +34V
BST1, BST2 to VDD.................................................-0.3V to +28V
TON1, TON2 to GND..............................................-0.3V to +28V
VDD to GND ..............................................................-0.3V to +6V
VDD to VCC ............................................................-0.3V to +0.3V
LX1 to BST1..............................................................-6V to +0.3V
LX2 to BST2..............................................................-6V to +0.3V
DH1 to LX1 ..............................................-0.3V to (VBST1 + 0.3V)
DH2 to LX2 ..............................................-0.3V to (VBST2 + 0.3V)
ILIM1, ILIM2, REF to GND ..........................-0.3V to (VCC + 0.3V)
CSH1, CSH2, CSL1, CSL2, FB2, REFIN1 to GND....-0.3V to +6V
EN1, EN2, SKIP, PGOOD1, PGOOD2 to GND.........-0.3V to +6V
DL1 to GND ................................................-0.3V to (VDD + 0.3V)
DL2 to PGND..............................................-0.3V to (VDD + 0.3V)
PGND to GND ......................................................-0.3V to + 0.3V
REF Short Circuit to GND ...........................................Continuous
Continuous Power Dissipation (TA = +70°C)
28-Pin TQFN T2844-1
(derate 20.8mW/°C above +70°C) ............................1667mW
Extended Operating Temperature Range .........-40°C to +105°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering 10s) ..................................+300°C
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.
ELECTRICAL CHARACTERISTICS
(VIN = 12V, VDD = VCC = EN1 = EN2 = 5V, VREFIN1 = 2V, SKIP = GND, TA = 0 to +85°C, unless otherwise noted. Typical values are
at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
PWM CONTROLLER
Input Voltage Range
Quiescent Supply Current
(VDD, VCC)
Shutdown Supply Current
(VDD, VCC)
On-Time (Note 1)
VIN
IDD + ICC
Output forced above regulation voltage,
EN1 = EN2 = 5V
4.5
ISHDN EN1 = EN2 = GND, TA = +25°C
tON1, tON2
VIN = 12V,
VCSL1 = VCSL2
= VCCI = 1.2V,
separate or
combined
mode
RTON1 = RTON2 = 97.5k
(600kHz)
RTON1 = RTON2 = 200k
(300kHz)
RTON1 = RTON2 = 302.5k
(200kHz)
142
(-15%)
305
(-10%)
425
(-15%)
26
1.7 2.5
0.1 5
174 194
(+15%)
336
368
(+10%)
500 575
(+15%)
V
mA
µA
ns
Minimum Off-Time
TON1, TON2, Shutdown Supply
Current
REFIN1 Voltage Range
FB2 Regulation Voltage
FB2 Input Voltage Range
tOFF(MIN)
ITON1,
ITON2
VREFIN1
VFB2
(Note 1)
EN1 = EN2 = GND, VTON1 = VTON2 = 26V,
VDD = 0V or 5V, TA = +25°C
(Note 2)
Adjustable mode
Preset mode
250 330
0.01 1
0 VREF
0.7
1.7 2.3
ns
µA
V
V
V
FB2 Combined-Mode Threshold
Combined mode
3.8
VCC -
1V
VCC -
0.4
V
REFIN1 Dual Mode™
Switchover Threshold
3.8 VCC - VCC -
1V 0.4
V
REFIN1, FB2 Bias Current
SMPS1 Voltage Accuracy
SMPS2 Voltage Accuracy
IREFIN1,
IFB2
VCSL1
VCSL2
REFIN1 = 0.5V to 2V;
VFB2 = 0.7V, TA = +25°C
Measured at CSL1, REFIN1 = VCC,
VIN = 2V to 26V, SKIP = VCC (Note 2)
Measured at CSL2, FB2 = REF,
VIN = 2V to 26V, SKIP = VCC (Note 2)
-0.1 +0.1
1.043 1.05 1.057
1.489 1.5 1.511
µA
V
V
Dual Mode is a trademark of Maxim Integrated Products, Inc.
2 _______________________________________________________________________________________


Part Number MAX17007
Description Dual and Combinable QPWM Graphics Core Controllers
Maker Maxim Integrated
PDF Download

MAX17007 Datasheet PDF






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