MAX1858 Maxim, MAX1858 Datasheet
MAX1858
Manufacturer Part Number
MAX1858
Description
Dual 180 Out-of-Phase PWM Step-Down Controller with Power Sequencing and POR
Manufacturer
Maxim
Datasheet
1.MAX1858.pdf
(22 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX1858AEEG
Manufacturer:
MAXIM/美信
Quantity:
20 000
Company:
Part Number:
MAX1858AEEG+
Manufacturer:
Maxim Integrated Products
Quantity:
135
Part Number:
MAX1858AEEG+T
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
MAX1858EEG
Manufacturer:
T32D
Quantity:
20 000
Company:
Part Number:
MAX1858EEG+
Manufacturer:
MAXIM
Quantity:
271
Company:
Part Number:
MAX1858EEG+T
Manufacturer:
MAXIM
Quantity:
2 566
Part Number:
MAX1858EEG+T
Manufacturer:
MAXIM/美信
Quantity:
20 000
Company:
Part Number:
MAX1858EEI
Manufacturer:
LT
Quantity:
3 731
Part Number:
MAX1858EUB
Manufacturer:
MAXIM/美信
Quantity:
20 000
The MAX1858A/MAX1875A/MAX1876A dual, synchro-
nized, step-down controllers generate two outputs from
input supplies ranging from 4.5V to 23V. Each output is
adjustable from sub-1V to 18V and supports loads of 10A
or higher. Input voltage ripple and total RMS input ripple
current are reduced by synchronized 180° out-of-phase
operation.
The switching frequency is adjustable from 100kHz to
600kHz with an external resistor. Alternatively, the con-
troller can be synchronized to an external clock gener-
ated by another MAX1858A/MAX1875A/MAX1876A or a
system clock. One MAX1858A/MAX1875A/MAX1876A
can be set to generate an in-phase, or 90° out-of-
phase, clock signal for synchronization with additional
controllers. This allows two controllers to operate either
as an interleaved two- or four-phase system with each
output shifted by 90°. The MAX1858A/MAX1875A/
MAX1876A feature soft-start. The MAX1858A also fea-
tures first-on/last-off power sequencing and soft-stop.
The MAX1858A/MAX1875A/MAX1876A eliminate the
need for current-sense resistors by utilizing the low-side
MOSFET’s on-resistance as a current-sense element.
This protects the DC-DC components from damage dur-
ing output-overload conditions or output short-circuit
faults without requiring a current-sense resistor.
Adjustable foldback current limit reduces power dissipa-
tion during short-circuit conditions. The MAX1858A/
MAX1876A include a power-on reset (POR) output to sig-
nal the system when both outputs reach regulation.
The MAX1858A/MAX1875A/MAX1876A ensure that the
output voltage does not swing negative when the input
power is removed or when EN is driven low. The
MAX1875A/MAX1876A also allow prebias startup with-
out discharging the output.
The MAX1858A/MAX1875A/MAX1876A are available in a
24-pin QSOP package. Use the MAX1875 evaluation kit
or the MAX1858 evaluation kit to evaluate the
MAX1858A/MAX1875A/MAX1876A.
19-2966; Rev 0; 10/03
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.
Dual 180° Out-of-Phase Buck Controllers with
Network Power Supplies
Telecom Power Supplies
DSP, ASIC, and FPGA Power Supplies
Set-Top Boxes
Broadband Routers
Servers
Desknote Computers
________________________________________________________________ Maxim Integrated Products
General Description
Sequencing/Prebias Startup and POR
Applications
o 4.5V to 23V Input Supply Range
o 0 to 18V Output Voltage Range (Up to 10A)
o Adjustable Lossless Foldback Current Limit
o Adjustable 100kHz to 600kHz Switching
o Optional Synchronization
o Clock Output for Master/Slave Synchronization
o 4 x 90° Out-of-Phase Step-Down Converters
o Prebias Startup (MAX1875A/MAX1876A)
o Power Sequencing (MAX1858A)
o RST Output with 140ms Minimum Delay
o Fixed-Frequency Pulse-Width Modulation (PWM)
MAX1858AEEG
MAX1875AEEG
MAX1876AEEG
TOP VIEW
Frequency
(Using Two Controllers, Figure 7)
(MAX1858A/MAX1876A)
Operation
PART
COMP2
COMP1
ILIM2
SYNC
ILIM1
GND
OSC
CKO
FB2
REF
FB1
V+
10
11
12
1
2
3
4
5
6
7
8
9
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
MAX1858A
MAX1875A
MAX1876A
Ordering Information
QSOP
Pin Configuration
24
23
22
21
20
19
18
17
16
15
14
13
EN
DH2
LX2
BST2
DL2
V
PGND
DL1
BST1
LX1
DH1
RST (N.C.)
() ARE FOR THE MAX1875A ONLY
L
PIN-PACKAGE
24 QSOP
24 QSOP
24 QSOP
Features
1
Related parts for MAX1858
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
The DS5250 is a highly secure, four clocks-per-machine cycle, 100% 8051-instruction-set-compatible microprocessor in Maxim's secure microcontroller family
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
The MAX9263/MAX9264 chipset extends Maxim's gigabit multimedia serial link (GMSL) technology to include high-bandwidth digital content protection (HDCP) encryption for content protection of DVD and Blu-ray™ video and audio data
Manufacturer:
Maxim
Part Number:
Description:
The Maxim MXL1016 (10ns, typ) high-speed, complementary-output comparator is designed specifically to
interface directly to TTL logic while operating from
either a dual ±5V supply or a single +5V supply
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's DG300–DG303 and DG300A–DG303A CMOS dual and quad analog switches combine low power operation with fast switching times and superior DC and AC switch characteristics
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's DG300–DG303 and DG300A–DG303A CMOS dual and quad analog switches combine low power operation with fast switching times and superior DC and AC switch characteristics
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's DG300–DG303 and DG300A–DG303A CMOS dual and quad analog switches combine low power operation with fast switching times and superior DC and AC switch characteristics
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's DG300–DG303 and DG300A–DG303A CMOS dual and quad analog switches combine low power operation with fast switching times and superior DC and AC switch characteristics
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG401/DG403/DG405 analog switches now feature guaranteed low on-resistance matching between switches (2Ω max) and guaranteed on-resistance flatness over the signal range (3Ω max)
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG401/DG403/DG405 analog switches now feature guaranteed low on-resistance matching between switches (2Ω max) and guaranteed on-resistance flatness over the signal range (3Ω max)
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG401/DG403/DG405 analog switches now feature guaranteed low on-resistance matching between switches (2Ω max) and guaranteed on-resistance flatness over the signal range (3Ω max)
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG406 and DG407 CMOS analog multiplexers now feature guaranteed matching between channels (8Ω max) and flatness over the specified signal range (9Ω max)
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG406 and DG407 CMOS analog multiplexers now feature guaranteed matching between channels (8Ω max) and flatness over the specified signal range (9Ω max)
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG408 and DG409 CMOS analog multiplexers now feature guaranteed matching between channels (8Ω max) and flatness over the specified signal range (9Ω max)
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG408 and DG409 CMOS analog multiplexers now feature guaranteed matching between channels (8Ω max) and flatness over the specified signal range (9Ω max)
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG411/DG412/DG413 analog switches now feature low on-resistance matching between switches (3Ω max) and guaranteed on-resistance flatness over the signal range (Δ4Ω max)
Manufacturer:
Maxim
Datasheet: