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PDF MAX8760 Data sheet ( Hoja de datos )
| Número de pieza | MAX8760 | |
| Descripción | Dual-Phase / Quick-PWM Controller for AMD Mobile Turion 64 CPU Core Power Supplies | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX8760 (archivo pdf) en la parte inferior de esta página. Total 39 Páginas | ||
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19-3721; Rev 0; 5/05
www.DataSheet4U.com
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% VOUT Accuracy 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 Range
♦ Adjustable Slew-Rate Control
♦ Drives Large Synchronous Rectifier MOSFETs
♦ Undervoltage and Thermal-Fault Protection
♦ Power Sequencing and Timing
♦ Selectable Suspend Voltage
♦ Soft-Start and Soft-Shutdown
♦ Selectable Single- or Dual-Phase Pulse Skipping
Ordering Information
PART
TEMP RANGE
MAX8760ETL -40°C to +100°C
MAX8760ETL+ -40°C to +100°C
+Denotes lead-free package.
PIN-PACKAGE
40 Thin QFN 6mm x 6mm
40 Thin QFN 6mm x 6mm
Pin Configuration
TOP VIEW
30 29 28 27 26 25 24 23 22 21
PGND
DLS
DHS
LXS
BSTS
V+
CMP
CMN
CSN
CSP
31
32
33
34
35
36
37
38
39
40
MAX8760
1 2 3 4 5 6 7 8 9 10
20 D4
19 D5
18 SKIP
17 OAIN+
16 OAIN-
15 FB
14 CCI
13 GNDS
12 CCV
11 GND
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
Turion is a trademark of AMD.
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  
www.DataSheet4U.com
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 = V SHDN = V SKIP = 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.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Current-Balance
Transconductance
Gm(IBAL)
400 µS
GATE DRIVERS
DH_ Gate-Driver On-Resistance
DL_ Gate-Driver On-Resistance
RON(DH)
RON(DL)
BST_ - LX_ forced to 5V
High state (pullup)
Low start (pulldown)
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
D0–D5 Logic Input High Voltage
CMRR
PSRR
AOA
VOAIN+ = VOAIN- = 0 to 2.5V
VCC = 4.5V to 5.5V
RL = 1kΩ to VCC/2
|VOAIN+ - VOAIN-| ≥ 10mV,
RL = 1kΩ to VCC/2
VCC - VFBH
VFBL
No sustained oscillations
VIH
VIL
V SHDN
To enable no-fault mode
SUS, SKIP
SHDN, SKIP, SUS
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
1.6 V
_______________________________________________________________________________________ 5
5 Page 
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Dual-Phase, Quick-PWM Controller for AMD
Mobile Turion 64 CPU Core Power Supplies
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN = 12V, VCC = VDD = 5V, SHDN = SKIP = VCC, D0–D5 set for 1.5V (SUS = GND), S0 and S1 set for 1V
(SUS = VCC), OFS = GND, TA = +25°C, unless otherwise specified.)
3.3V
0
0
1.46V
0
0
0
POWER-UP SEQUENCE
MAX8760 toc17
A
B
3.3V
0
C0
D0
E0
SOFT-START
MAX8760 toc18
A
B
C
D
3.3V
1.46V
SOFT-SHUTDOWN WAVEFORMS
MAX8760 toc19
A
B
10A
C
10A
D
2ms/div
A. SHDN, 5V/div
B. VROK, 5V/div
C. 1.5V OUTPUT, 1V/div
D. IL1, 10A/div
E. IL2, 10A/div
RLOAD = 75mΩ
200µs/div
A. SHDN, 5V/div
B. 1.5V OUTPUT, 500mV/div
C. IL1, 10A/div
D. IL2, 10A/div
RLOAD = 75mΩ
200µs/div
A. SHDN, 5V/div
B. 1.5V OUTPUT, 500mV/div
C. IL1, 10A/div
D. IL2, 10A/div
RLOAD = 75mΩ
15A
5A
15A
5A
1.48A
1.44V
1.30V LOAD TRANSIENT
(10A TO 30A LOAD)
MAX8760 toc20
A
B
C
20µs/div
A. IL1, 10A/div
B. IL2, 10A/div
C. OUTPUT VOLTAGE, 20mV/div
OFFSET TRANSITION
MAX8760 toc21
0.2V
A
0
1.5V B
5A
5A
20µs/div
A. VOFS = 0 TO 200mV, 0.2V/div
B. VOUT = 1.500V TO 1.475V, 20mV/div
C. IL1, 10A/div
D. IL2, 10A/div
10A LOAD
C
D
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 39 Páginas | |
| PDF Descargar | [ Datasheet MAX8760.PDF ] | |
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