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MAX1519ETL-MAX1545ETL
Dual-Phase, Quick-PWM Controllers for Programmable CPU Core Power Supplies
General DescriptionThe MAX1519/MAX1545 are dual-phase, Quick-PWM™,
step-down controllers for desktop and mobile Pentium®4
(P4) CPU core supplies. Dual-phase operation reduces
input ripple current requirements and output voltage rip-
ple while easing component selection and layout difficul-
ties. The Quick-PWM control scheme provides
instantaneous response to fast load-current steps. The
MAX1519/MAX1545 include active voltage positioning
with adjustable gain and offset, reducing power dissipa-
tion and bulk output capacitance requirements.
The MAX1519/MAX1545 are intended for two different
notebook CPU core applications: stepping down the bat-
tery directly or stepping down the 5V system supply to
create the core voltage. The single-stage conversion
method allows these devices to directly step down high-
voltage batteries for the highest possible efficiency.
Alternatively, two-stage conversion (stepping down the
5V system supply instead of the battery) at a higher
switching frequency provides the minimum possible
physical size.
The MAX1519/MAX1545 comply with Intel’s P4 specifi-
cations. The switching regulator features soft-start,
power-up sequencing, and soft-shutdown. The
MAX1519/MAX1545 also feature independent four-level
logic inputs for setting the suspend voltage (S0–S1).
The MAX1519/MAX1545 include output undervoltage
protection (UVP), thermal protection, and voltage regula-
tor power-OK (VROK) output. When any of these protec-
tion features detect a fault, the controller shuts down.
Additionally, the MAX1519/MAX1545 include overvoltage
protection.
The MAX1519/MAX1545 are available in low-profile, 40-
pin, 6mm x 6mm thin QFN packages. For other CPU
platforms, refer to the pin-to-pin compatible MAX1544
and MAX1532/MAX1546/MAX1547 data sheets.
ApplicationsDesktop and Mobile P4 Computers
Multiphase CPU Core Supply
Voltage-Positioned Step-Down Converters
Servers/Desktop Computers
Low-Voltage, Digitally Programmable Power
Supplies
FeaturesDual-Phase, Quick-PWM Controllers±0.75% VOUTAccuracy Over Line, Load, and
Temperature (1.3V)Active Voltage Positioning with Adjustable Gain
and Offset5-Bit On-Board DAC
Mobile: 0.60V to 1.75V Output Range
Desktop: 1.10V to 1.85V Output RangeSelectable 100kHz/200kHz/300kHz/550kHz
Switching Frequency4V to 28V Battery Input Voltage RangeAdjustable Slew-Rate ControlDrive Large Synchronous Rectifier MOSFETsOutput Overvoltage Protection (MAX1545 Only)Undervoltage and Thermal-Fault ProtectionPower Sequencing and TimingSelectable Suspend Voltage (0.675V to 1.45V)Soft-ShutdownSelectable Single- or Dual-Phase Pulse Skipping
MAX1519/MAX1545
Programmable CPU Core Power Supplies
Pin Configuration
Ordering Information19-2734; Rev 1; 9/03
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
Pentium is a registered trademark of Intel Corp.
MAX1519/MAX1545
Dual-Phase, Quick-PWM Controllers for
Programmable CPU Core Power Supplies
ABSOLUTE MAXIMUM RATINGSStresses 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–D4 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, CODE 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= VTON= VSKIP= VS0= VS1= VCODE= 5V, VFB= VCMP= VCMN= VCSP= VCSN
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.
MAX1519/MAX1545
Dual-Phase, Quick-PWM Controllers for
Programmable CPU Core Power Supplies
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, V+ = 15V, VCC= VDD= VSHDN= VTON= VSKIP= VS0= VS1= VCODE= 5V, VFB= VCMP= VCMN= VCSP= VCSN
= 1.3V, OFS = SUS = GNDS = D0–D4 = GND; TA
= 0°C to +85°C, unless otherwise specified. Typical values are at TA= +25°C.)
MAX1519/MAX1545
Dual-Phase, Quick-PWM Controllers for
Programmable CPU Core Power Supplies
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, V+ = 15V, VCC= VDD= VSHDN= VTON= VSKIP= VS0= VS1= VCODE= 5V, VFB= VCMP= VCMN= VCSP= VCSN
= 1.3V, OFS = SUS = GNDS = D0–D4 = GND; TA
= 0°C to +85°C, unless otherwise specified. Typical values are at TA= +25°C.)
MAX1519/MAX1545
Dual-Phase, Quick-PWM Controllers for
Programmable CPU Core Power Supplies
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, V+ = 15V, VCC= VDD= VSHDN= VTON= VSKIP= VS0= VS1= VCODE= 5V, VFB= VCMP= VCMN= VCSP= VCSN
= 1.3V, OFS = SUS = GNDS = D0–D4 = GND; TA
= 0°C to +85°C, unless otherwise specified. Typical values are at TA= +25°C.)
