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MAX1545数据手册封面

MAX1545 Datasheet

  • MAX1545

  • dual-phase, Quick-PWM™, step-down controllers

  • 813.95KB

  • Maxim   Maxim

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19-2734; Rev 0; 1/03
KIT
ATION
EVALU
BLE
AVAILA
Dual-Phase, Quick-PWM Controllers for
Programmable CPU Core Power Supplies
General Description
Features
o
Dual-Phase, Quick-PWM Controllers
o
卤0.75% V
OUT
Accuracy Over Line, Load, and
Temperature (1.3V)
o
Active Voltage Positioning with Adjustable Gain
and Offset
o
5-Bit On-Board DAC
Mobile: 0.60V to 1.75V Output Range
Desktop: 1.10V to 1.85V Output Range
o
Selectable 100kHz/200kHz/300kHz/550kHz
Switching Frequency
o
4V to 28V Battery Input Voltage Range
o
Adjustable Slew-Rate Control
o
Drive Large Synchronous Rectifier MOSFETs
o
Output Overvoltage Protection (MAX1545 Only)
o
Undervoltage and Thermal-Fault Protection
o
Power Sequencing and Timing
o
Selectable Suspend Voltage (0.675V to 1.45V)
o
Soft-Shutdown
o
Selectable Single- or Dual-Phase Pulse Skipping
MAX1519/MAX1545
The MAX1519/MAX1545 are dual-phase, Quick-PWM鈩?
step-down controllers for desktop and mobile Pentium
庐
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鈥檚 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鈥揝1).
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.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
40 Thin QFN 6mm
鉁?/div>
6mm
40 Thin QFN 6mm
鉁?/div>
6mm
MAX1519ETL
-40掳C to +100掳C
MAX1545ETL
-40掳C to +100掳C
Pin Configuration
BSTS
LXS
DHS
DLS
35
34
33
32
CSN
CMN
Applications
Desktop and Mobile P4 Computers
Multiphase CPU Core Supply
Voltage-Positioned Step-Down Converters
Servers/Desktop Computers
Low-Voltage, Digitally Programmable Power
Supplies
TIME
TON
SUS
S0
S1
SHDN
OFS
REF
ILIM
V
CC
1
2
3
4
5
6
7
8
9
10
40
39
38
37
36
CMP
V+
CSP
TOP VIEW
31
PGND
30
29
28
27
26
25
24
23
22
21
11
12
13
14
15
16
17
18
19
20
V
DD
DLM
DHM
LXM
BSTM
VROK
D0
D1
D2
D3
MAX1519
MAX1545
CCI
FB
OAIN-
OAIN+
SKIP
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
Pentium is a registered trademark of Intel Corp.
CCV
GNDS
THIN QFN
________________________________________________________________
Maxim Integrated Products
CODE
D4
GND
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

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