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MAX8760ETLMAXIMN/a1300avaiDual-Phase, Quick-PWM Controller for AMD Mobile Turion 64 CPU Core Power Supplies
MAX8760ETL+ |MAX8760ETLMAXINN/a63avaiDual-Phase, Quick-PWM Controller for AMD Mobile Turion 64 CPU Core Power Supplies


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MAX8760ETL-MAX8760ETL+
Dual-Phase, Quick-PWM Controller for AMD Mobile Turion 64 CPU Core Power Supplies
General Description
The MAX8760 is a dual-phase, Quick-PWM™, step-
down controller for 6-bit VID AMD Mobile Turion™ 64
CPU core supplies. Dual-phase operation reduces input
ripple current requirements and output voltage ripple
while easing component selection and layout difficulties.
The quick-PWM control scheme provides instantaneous
response to fast-load current steps. The MAX8760
includes active voltage positioning with adjustable gain
and offset, reducing power dissipation and bulk output
capacitance requirements.
The MAX8760 is intended for two different notebook CPU
core applications: stepping down the battery directly or
stepping down the 5V system supply to create the core
voltage. The single-stage conversion method allows this
device to directly step down high-voltage batteries for the
highest possible efficiency. Alternatively, two-stage con-
version (stepping down the 5V system supply instead of
the battery) at a higher switching frequency provides the
minimum possible physical size.
The MAX8760 complies with AMD’s desktop and mobile
CPU specifications. The switching regulator features soft-
start and power-up sequencing, and soft-shutdown. The
MAX8760 also features independent four-level logic inputs
for setting the suspend voltage (S0, S1).
The MAX8760 includes output undervoltage protection,
thermal protection, and voltage regulator power-OK
(VROK) output. When any of these protection features
detect a fault, the controller shuts down.
The MAX8760 is available in a low-profile, 40-pin 6mm x
6mm thin QFN package. For other CPU platforms, refer to
the pin-to-pin compatible MAX1544, MAX1519/MAX1545,
and MAX1532/MAX1546/MAX1547 data sheets.
Applications

6-Bit VID AMD Mobile Turion 64 CPU
Multiphase CPU Core Supply
Voltage-Positioned Step-Down Converters
Servers/Desktop Computers
Features
Dual-Phase, Quick-PWM Controller±0.75% VOUTAccuracy Over Line, Load, and
Temperature (1.3V)
Active Voltage Positioning with Adjustable Gain
and Offset
6-Bit On-Board DAC: 0.375V to 1.55V Output
Adjust Range
Selectable 100kHz/200kHz/300kHz/550kHz
Switching Frequency
4V to 28V Battery Input Voltage RangeAdjustable Slew-Rate ControlDrives Large Synchronous Rectifier MOSFETsUndervoltage and Thermal-Fault ProtectionPower Sequencing and TimingSelectable Suspend VoltageSoft-Start and Soft-ShutdownSelectable Single- or Dual-Phase Pulse Skipping
Pin Configuration
Ordering Information
MAX8760
Dual-Phase, Quick-PWM Controller for AMD
Mobile Turion 64 CPU Core Power Supplies

19-3721; Rev 0; 5/05
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
Turion is a trademark of AMD.
+Denotes lead-free package.
MAX8760
Dual-Phase, Quick-PWM Controller for AMD
Mobile Turion 64 CPU Core Power Supplies
ABSOLUTE MAXIMUM RATINGS

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
VCCto GND..............................................................-0.3V to +6V
VDDto PGND............................................................-0.3V to +6VSKIP, SUS, D0–D5 to GND.......................................-0.3V to +6V
ILIM, FB, OFS, CCV, CCI, REF, OAIN+,
OAIN- to GND.........................................-0.3V to (VCC+ 0.3V)
CMP, CSP, CMN, CSN, GNDS to GND......-0.3V to (VCC+ 0.3V)
TON, TIME, VROK, S0–S1 to GND..............-0.3V to (VCC+ 0.3V)SHDNto GND (Note 1)...........................................-0.3V to +18V
DLM, DLS to PGND....................................-0.3V to (VDD+ 0.3V)
BSTM, BSTS to GND..............................................-0.3V to +36V
DHM to LXM...........................................-0.3V to (VBSTM+ 0.3V)
LXM to BSTM............................................................-6V to +0.3V
DHS to LXS..............................................-0.3V to (VBSTS+ 0.3V)
LXS to BSTS.............................................................-6V to +0.3V
GND to PGND.......................................................-0.3V to +0.3V
REF Short-Circuit Duration.........................................Continuous
Continuous Power Dissipation (TA= +70°C)
40-Pin 6mm ✕6mm Thin QFN
(derate 23.2mW/°C above +70°C)...............................1.860W
Operating Temperature Range.........................-40°C to +100°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, V+ = 15V, VCC= VDD= VSHDN= VSKIP= VS0= VS1= 5V, VFB= VCMP= VCMN= VCSP= VCSN= 1.3V, OFS =
SUS = GNDS = D0–D5 = GND, TA= 0°C to +85°C, unless otherwise specified. Typical values are at TA= +25°C.)
Note 1:
SHDNmay be forced to 12V for the purpose of debugging prototype boards using the no-fault test mode, which disables
fault protection and overlapping operation.
MAX8760
Dual-Phase, Quick-PWM Controller for AMD
Mobile Turion 64 CPU Core Power Supplies
ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V+ = 15V, VCC= VDD= VSHDN= VSKIP= VS0= VS1= 5V, VFB= VCMP= VCMN= VCSP= VCSN= 1.3V, OFS =
SUS = GNDS = D0–D5 = GND, TA= 0°C to +85°C, unless otherwise specified. Typical values are at TA= +25°C.)
MAX8760
Dual-Phase, Quick-PWM Controller for AMD
Mobile Turion 64 CPU Core Power Supplies
ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V+ = 15V, VCC= VDD= VSHDN= VSKIP= VS0= VS1= 5V, VFB= VCMP= VCMN= VCSP= VCSN= 1.3V, OFS =
SUS = GNDS = D0–D5 = GND, TA= 0°C to +85°C, unless otherwise specified. Typical values are at TA= +25°C.)
MAX8760
Dual-Phase, Quick-PWM Controller for AMD
Mobile Turion 64 CPU Core Power Supplies
ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V+ = 15V, VCC= VDD= VSHDN= VSKIP= VS0= VS1= 5V, VFB= VCMP= VCMN= VCSP= VCSN= 1.3V, OFS =
SUS = GNDS = D0–D5 = GND, TA= 0°C to +85°C, unless otherwise specified. Typical values are at TA= +25°C.)
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