MAX746 Maxim, MAX746 Datasheet
MAX746
Manufacturer Part Number
MAX746
Description
High-Efficiency / PWM / Step-Down / N-Channel DC-DC Controller
Manufacturer
Maxim
Datasheet
1.MAX746.pdf
(16 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX7461EUK
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
MAX7461EUK+
Manufacturer:
MAXIM/美信
Quantity:
20 000
Company:
Part Number:
MAX7461EUK+T
Manufacturer:
KINGBRIGHT
Quantity:
4 000
Company:
Part Number:
MAX7461EUK+T
Manufacturer:
MAXIM
Quantity:
445
Company:
Part Number:
MAX7462USA+
Manufacturer:
Maxim Integrated Products
Quantity:
135
Part Number:
MAX7463USA
Manufacturer:
MAXIM/美信
Quantity:
20 000
Company:
Part Number:
MAX7463USA+
Manufacturer:
Maxim Integrated Products
Quantity:
135
Part Number:
MAX7465EAX
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
MAX746CSE
Manufacturer:
MAXIM/美信
Quantity:
20 000
The MAX746 is a high-efficiency, high-current, step-down
DC-DC power-supply controller that drives external N-chan-
nel FETs. It provides 93% to 96% efficiency from a 6V supply
voltage with load currents ranging from 50mA up to 3A. It
uses a pulse-width-modulating (PWM) current-mode control
scheme to provide precise output regulation and low output
noise. The MAX746's 4V to 15V input voltage range, fixed
5V/adjustable (Dual-Mode
limit make this device ideal for a wide range of applications.
High efficiency is maintained with light loads due to a propri-
etary automatic pulse-skipping control (Idle-Mode
that minimizes switching losses by reducing the switching fre-
quency at light loads. The low 950µA quiescent current and
ultra-low 1.4µA shutdown current further extend battery life.
External components are protected by the MAX746's cycle-
by-cycle current limit. The MAX746 also features a 2V ±1.5%
reference, a comparator for low-battery detection or level
translating, and soft-start and shutdown capability.
The MAX747—discussed in a separate data sheet—
functions similarly to the MAX746, but drives P-channel logic
level FETs.
________________________Applications
19-0192; Rev 1; 11/93
™Dual-Mode and Idle-Mode are trademarks of Maxim Integrated Products.
Call toll free 1-800-998-8800 for free samples or literature.
__________Typical Operating Circuit
_______________General Description
INPUT 6V TO 15V
DETECTOR INPUT
5V-to-3.3V Green PC Applications
Notebook/Laptop Computers
Personal Digital Assistants
Battery-Operated Equipment
Cellular Phones
LOW-BATTERY
ON/OFF
SHDN
REF
CP
LBI
HIGH
SS
________________________________________________________________ Maxim Integrated Products
CC
MAX746
TM
V+
FB
) output, and adjustable current
AGND
GND
AV+
OUT
EXT
LBO
CS
High-Efficiency, PWM, Step-Down,
40m
39 H
LOW-BATTERY
DETECTOR OUTPUT
TM
440 F
) scheme
OUTPUT
N-Channel DC-DC Controller
5V
____________________________Features
* Contact factory for dice specifications.
__________________Pin Configuration
______________Ordering Information
MAX746CPE
MAX746CSE
MAX746C/D
MAX746EPE
MAX746ESE
MAX746MJE
93% to 96% Efficiency for 50mA to 3A
Output Currents
4V to 15V Input Voltage Range
Low 950µA Supply Current
1.4µA Shutdown Current
Drives External N-Channel FETs
Fixed-Frequency Current-Mode PWM (Heavy Loads)
Idle-Mode PFM (Light Loads)
Cycle-by-Cycle Current Limiting
2V ±1.5% Accurate Reference Output
Adjustable Soft-Start
Undervoltage Lockout
Precision Comparator for Power-Fail or
Low-Battery Warning
TOP VIEW
PART
SHDN
LBO
REF
AV+
LBI
CC
SS
FB
1
2
3
4
5
6
7
8
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
MAX746
DIP/SO
16
15
14
13
12
11
10
9
16 Plastic DIP
16 Narrow SO
Dice*
16 Plastic DIP
16 Narrow SO
16 CERDIP
GND
V+
CP
HIGH
EXT
AGND
CS
OUT
PIN-PACKAGE
1
Related parts for MAX746
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: