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PDF MAX1519 Data sheet ( Hoja de datos )
| Número de pieza | MAX1519 | |
| Descripción | (MAX1519 / MAX1545) Quick-PWM Controllers | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX1519 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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19-2734; Rev 1; 9/03
EVAALVUAAILTAIOBNLEKIT
Dual-Phase, Quick-PWM Controllers for
Programmable CPU Core Power Supplies
General Description
The 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.
Applications
Desktop and Mobile P4 Computers
Multiphase CPU Core Supply
Voltage-Positioned Step-Down Converters
Servers/Desktop Computers
Low-Voltage, Digitally Programmable Power
Supplies
Features
o Dual-Phase, Quick-PWM Controllers
o ±0.75% VOUT 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
Ordering Information
PART
TEMP RANGE
MAX1519ETL -40°C to +100°C
MAX1545ETL -40°C to +100°C
PIN-PACKAGE
40 Thin QFN 6mm ✕ 6mm
40 Thin QFN 6mm ✕ 6mm
TOP VIEW
Pin Configuration
TIME
TON
SUS
S0
S1
SHDN
OFS
REF
ILIM
VCC
1
2
3
4
5
6
7
8
9
10
MAX1519
MAX1545
30 VDD
29 DLM
28 DHM
27 LXM
26 BSTM
25 VROK
24 D0
23 D1
22 D2
21 D3
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
Pentium is a registered trademark of Intel Corp.
THIN QFN
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
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.)
PARAMETER
GATE DRIVERS
DH_ Gate-Driver On-Resistance
DL_ Gate-Driver On-Resistance
SYMBOL
CONDITIONS
RON(DH)
RON(DL)
BST_ - LX_ forced to 5V
High state (pullup)
Low start (pulldown)
MIN TYP MAX UNITS
1.0 4.5
1.0 4.5
0.4 2
Ω
Ω
DH_ Gate-Driver Source/Sink
Current
IDH
DH_ forced to 2.5V,
BST_ - LX_ forced to 5V
1.6 A
DL_ Gate-Driver Sink Current
IDL(SINK) DL_ forced to 5V
DL_ Gate-Driver Source Current IDL(SOURCE) DL_ forced to 2.5V
Dead Time
tDEAD
DL_ rising
DH_ rising
VOLTAGE-POSITIONING AMPLIFIER
Input Offset Voltage
VOS
Input Bias Current
IBIAS
OAIN+, OAIN-
Op Amp Disable Threshold
VOAIN-
4A
1.6 A
35
ns
26
-1 +1
0.1 200
3
VCC - 1
VCC -
0.4
mV
nA
V
Common-Mode Input Voltage
Range
VCM
Guaranteed by CMRR test
0 2.5 V
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Large-Signal Voltage Gain
Output Voltage Swing
Input Capacitance
Gain-Bandwidth Product
Slew Rate
Capacitive-Load Stability
LOGIC AND I/O
SHDN Input High Voltage
SHDN Input Low Voltage
SHDN No-Fault Threshold
Three-Level Input Logic Levels
Logic Input Current
CMRR
PSRR
AOA
VOAIN+ = VOAIN- = 0 to 2.5V
VCC = 4.5V to 5.5V
RL = 1kΩ to VCC/2
|VOAIN+ - VOAIN-| ≥ 10mV, VCC - VFBH
RL = 1kΩ to VCC/2
VFBL
No sustained oscillations
VIH
VIL
VSHDN
SUS, SKIP
SHDN, SUS, SKIP
High
REF
Low
70 115
dB
75 100
dB
80 112
dB
77 300
mV
47 200
11 pF
3 MHz
0.3 V/µs
400 pF
0.8 V
0.4 V
12 15 V
2.7
1.2 2.3 V
0.8
-1 +1 µA
D0–D4 Logic Input High Voltage
1.6 V
D0–D4 Logic Input Low Voltage
0.8 V
_______________________________________________________________________________________ 5
5 Page 
Dual-Phase, Quick-PWM Controllers for
Programmable CPU Core Power Supplies
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN = 12V, VCC = VDD = 5V, SHDN = SKIP = VCC, D0–D4 set for 1.5V (SUS = GND), S0–S1 set
for 1V (SUS = VCC), OFS = GND, TA = +25°C, unless otherwise specified.)
POWER-UP SEQUENCE
MAX1519 toc18
5V
A
0V
2V
1V B
0V
5V
C
0V
1ms/div
A. SHDN, 5V/div
B. 1.5V OUTPUT, 1V/div
C. VROK, 5V/div
RTIME = 64.9kΩ
SOFT-START
MAX1519 toc19
5V
A
0V
1.5V
B
0V
10A
0A
0A
100µs/div
A. SHDN, 5V/div
B. 1.5V OUTPUT, 1V/div
C. IL1, 10A/div
D. IL2, 10A/div
RLOAD = 75mΩ, RTIME = 64.9kΩ
C
D
SOFT-SHUTDOWN
MAX1519 toc20
5V
A
0V
1.5V
B
0V
10A
C
10A
0A D
200µs/div
A. SHDN, 5V/div
B. 1.5V OUTPUT, 1V/div
C. IL1, 10A/div
D. IL2, 10A/div
RLOAD = 75mΩ, RTIME = 64.9kΩ
1.50V LOAD TRANSIENT
(10A TO 50A LOAD)
MAX1519 toc21
50A
A
10A
1.5V
B
20A
20A
0A C
0A D
20µs/div
A. LOAD CURRENT, (ILOAD = 10A TO 50A), 50A/div
B. OUTPUT VOLTAGE (1.5V NO LOAD), 100mV/div
C. IL1, 10A/div
D. IL2, 10A/div
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX1519.PDF ] | |
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