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PDF MAX5060 Data sheet ( Hoja de datos )
| Número de pieza | MAX5060 | |
| Descripción | (MAX5060 / MAX5061) Average-Current-Mode DC-DC Controllers | |
| Fabricantes | Maxim Integrated Products | |
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19-3583; Rev 2; 7/05
0.6V to 5.5V Output, Parallelable,
Average-Current-Mode DC-DC Controllers
General Description
The MAX5060/MAX5061 pulse-width modulation (PWM)
DC-DC controllers provide high-output-current capability
in a compact package with a minimum number of exter-
nal components. These devices utilize an average-cur-
rent-mode control that enables optimal use of low
RDS(ON) MOSFETs, eliminating the need for external
heatsinks even when delivering high output currents.
Differential sensing (MAX5060) enables accurate control
of the output voltage, while adaptive voltage positioning
provides optimum transient response. An internal regula-
tor enables operation with 4.75V to 5.5V or 7V to 28V
input voltage ranges. The high switching frequency, up
to 1.5MHz, allows the use of low-output inductor values
and input capacitor values. This accommodates the use
of PC-board-embedded planar magnetics.
The MAX5060 features a clock output with 180° phase
delay to control a second out-of-phase converter for
lower capacitor ripple currents. The MAX5060 also limits
the reverse current if the bus voltage becomes higher
than the regulated output voltage. The MAX5060 is
specifically designed to limit current sinking when multi-
ple power-supply modules are paralleled. The
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MAX5060/MAX5061 offer an adjustable 0.6V to 5.5V out-
put voltage. The MAX5060 offers an overvoltage protec-
tion, power-good signal, and an output enable function.
The MAX5060/MAX5061 operate over the automotive
temperature range (-40°C to +125°C). The MAX5060 is
available in a 28-pin thin QFN package while the
MAX5061 is available in a 16-pin TSSOP package.
Applications
Servers and Workstations
Point-of-Load Telecom DC-DC Regulators
Networking Systems
RAID Systems
High-End Desktop Computers
Features
♦ 4.75V to 5.5V or 7V to 28V Input Voltage Range
♦ Adjustable Output Voltage from 0.6V to 5.5V
♦ Up to 30A Output Current
♦ Can Parallel Outputs For Higher Output Current
♦ Programmable Adaptive Output Voltage
Positioning
♦ True-Differential Remote Output Sensing
(MAX5060)
♦ Average-Current-Mode Control
• Superior Current Sharing Between Paralleled
Modules
• Accurate Current Limit Eliminates MOSFET
and Inductor Derating
♦ Limits Reverse Current Sinking in Paralleled
Modules (MAX5060)
♦ Programmable Switching Frequency from 125kHz
to 1.5MHz
♦ Integrated 4A Gate Drivers
♦ Clock Output for 180° Out-of-Phase Operation
(MAX5060)
♦ Voltage Signal Proportional to Output Current for
Load Monitoring (MAX5060)
♦ Output Overvoltage Crowbar Protection
(MAX5060)
♦ Programmable Hiccup Current-Limit Threshold
and Response Time
♦ Overtemperature Thermal Shutdown
Ordering Information
PART
MAX5060
MAX5061
Selector Guide
OUTPUT
Average-Current-Mode DC-DC Controller
for 5V/12V/24V Input Bus with CLKOUT,
Load Monitoring, Overvoltage, EN Input,
SYNC Input, and PGOOD Output
Average-Current-Mode DC-DC Controller
for 5V/12V/24V Input with SYNC/ENABLE
Input
PART
TEMP RANGE
PIN-PACKAGE
PKG
CODE
MAX5060ATI -40°C to +125°C 28 TQFN-EP*
MAX5060ETI -40°C to +85°C 28 TQFN-EP*
T2855-3
T2855-3
MAX5061AUE -40°C to +125°C
MAX5061EUE -40°C to +85°C
*EP = Exposed pad.
16 TSSOP-EP*
16 TSSOP-EP*
U16E-3
U16E-3
Pin Configurations appear at end of data sheet.
________________________________________________________________ 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  
0.6V to 5.5V Output, Parallelable,
Average-Current-Mode DC-DC Controllers
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 5V, VDD = VCC (MAX5060 only), TA = TJ = TMIN to TMAX, unless otherwise noted. Typical specifications are at TA = +25°C.)
(Note 1)
PARAMETER
ENABLE INPUTS
EN Input High Voltage (MAX5060)
EN Input Hysteresis (MAX5060)
EN Pullup Current (MAX5060)
RT/SYNC/EN Input High Voltage
Enable (MAX5061)
SYMBOL
VEN
IEN
VRT/SYNC/EN_H
EN rising
CONDITIONS
MIN TYP MAX UNITS
2.437 2.5 2.562
0.28
13.5 15 16.5
1.6
V
V
µA
V
RT/SYNC/EN Input Low Voltage
Disable (MAX5061)
THERMAL SHUTDOWN
Thermal Shutdown
Thermal-Shutdown Hysteresis
VRT/SYNC/EN_L
Temperature rising
0.4 V
+150
30
°C
°C
Note 1: Specifications at TA = +25°C are 100% tested. Specifications over the temperature range are guaranteed by design.
Note 2: Does not include an error due to finite error amplifier gain (see the Voltage-Error Amplifier section).
_______________________________________________________________________________________ 5
5 Page 
0.6V to 5.5V Output, Parallelable,
Average-Current-Mode DC-DC Controllers
PIN
MAX5060
MAX5061
17 12
18 13
19 —
20 14
21 15
23 —
24 —
26 1
27 2
28 —
—9
——
Pin Description (continued)
NAME
FUNCTION
EAOUT
EAN
DIFF
CSN
CSP
SENSE-
SENSE+
IN
VCC
VDD
RT/SYNC/EN
EP
Voltage-Error-Amplifier Output. Connect to the external gain-setting feedback
resistor. The error-amplifier gain-setting resistors determine the amount of
adaptive voltage positioning.
Voltage-Error-Amplifier Inverting Input. Receives a signal from the output of the
differential remote-sense amplifier (MAX5060). Connect the center tap of the
resistor-divider from the output to SGND (MAX5061).
Differential Remote-Sense Amplifier Output. DIFF is the output of a precision
unity-gain amplifier whose inputs are SENSE+ and SENSE-.
Current-Sense Differential Amplifier Negative Input. The differential voltage
between CSN and CSP is amplified internally by the current-sense amplifier
(gain = 34.5) to measure the inductor current.
Current-Sense Differential Amplifier Positive Input. The differential voltage
between CSP and CSN is amplified internally by the current-sense amplifier
(gain = 34.5) to measure the inductor current.
Differential Output-Voltage-Sensing Negative Input. SENSE- is used to sense a
remote load. Connect SENSE- to VOUT- or PGND at the load.
Differential Output-Voltage-Sensing Positive Input. SENSE+ is used to sense a
remote load. Connect SENSE+ to VOUT+ at the load. The device regulates the
difference between SENSE+ and SENSE- according to the preset reference
voltage of 0.6V.
Supply Voltage Connection. Connect IN to VCC for a +5V system.
Internal +5V Regulator Output. VCC is derived from the IN voltage. Bypass VCC
to SGND with 4.7µF and 0.1µF ceramic capacitors. For MAX5061, connect an
additional 0.1µF bypass capacitor from VCC to PGND.
Supply Voltage for Low-Side and High-Side Drivers. Connect a parallel
combination of 0.1µF and 1µF ceramic capacitors to PGND and a 1Ω resistor to
VCC to filter out the high peak currents of the driver from the internal circuitry.
Switching Frequency Programming and Chip-Enable Input. Connect a resistor
from RT/SYNC/EN to SGND to set the internal oscillator frequency. Drive
RT/SYNC/EN externally to synchronize the switching frequency with system
clock. If RT/SYNC/EN is held low for 50µs, the device turns off the output drivers.
Exposed Paddle. Connect the exposed paddle to a copper pad (SGND) to
improve power dissipation.
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX5060.PDF ] | |
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