MAX1623 Maxim, MAX1623 Datasheet
MAX1623
Manufacturer Part Number
MAX1623
Description
3A / Low-Voltage / Step-Down Regulator with Synchronous Rectification and Internal Switches
Manufacturer
Maxim
Datasheet
1.MAX1623.pdf
(12 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX1623BAP
Manufacturer:
MAXIM/美信
Quantity:
20 000
Company:
Part Number:
MAX1623EAI
Manufacturer:
MAXIM
Quantity:
79
Part Number:
MAX1623EAI
Manufacturer:
MAXIM/美信
Quantity:
20 000
Company:
Part Number:
MAX1623EAP
Manufacturer:
MAXIM
Quantity:
27
Company:
Part Number:
MAX1623EAP
Manufacturer:
MAXIM
Quantity:
9
Company:
Part Number:
MAX1623EAP
Manufacturer:
MAXIM
Quantity:
2
Part Number:
MAX1623EAP
Manufacturer:
MAX
Quantity:
20 000
Company:
Part Number:
MAX1623EAP+
Manufacturer:
Maxim
Quantity:
278
Part Number:
MAX1623EAP+T
Manufacturer:
专营MAXIM
Quantity:
20 000
19-1436; Rev 1; 9/99
The MAX1623 switch-mode buck regulator with syn-
chronous rectification provides local CPU and bus-ter-
mination power in notebook and desktop computers.
An internal 55m
60m
deliver continuous load currents up to 3A from a 5V
supply with 95% typical efficiency. Output accuracy is
±1%, including line and load regulation.
The MAX1623 features constant-off-time, current-mode
pulse-width-modulation (PWM) control with switching
frequencies as high as 350kHz. An external resistor at
the TOFF pin sets the off-time, allowing optimum design
flexibility in terms of switching frequency, output switch-
ing noise, and inductor size. This device is available in
a space-saving 20-pin SSOP package.
Idle Mode is a trademark of Maxim Integrated Products.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
________________________Applications
Synchronous Rectification and Internal Switches
INPUT
+5V
5V to 3.3V Conversion
Notebook Computer CPU I/O Supply
Desktop Computer Bus-Termination Supply
CPU Daughter Card Supply
DSP Supply
(typ), 3A NMOS synchronous-rectifier switch
3A, Low-Voltage, Step-Down Regulator with
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
(typ), 3A PMOS power switch and
IN
SHDN
TOFF
General Description
V
FBSEL
COMP
CC
MAX1623
PGND
REF
GND
LX
FB
+2.5V
OUTPUT
____________________________Features
MAX1623EAP
±1% Output Accuracy, Including Line and Load
Regulation
94% Efficiency
Internal Switches
Guaranteed 3A Load Capability
Minimal External Components
Pin-Selectable Fixed 3.3V, 2.5V, or
Adjustable (1.1V to 3.8V) Output Voltage
+4.5V to +5.5V Input Voltage Range
400µA (typ) Supply Current
<1µA Shutdown Supply Current
Constant-Off-Time PWM Operation
Switching Frequencies Up to 350kHz
Idle Mode™ Operation at Light Loads
Thermal Shutdown Protection
Available in 20-Pin SSOP
TOP VIEW
55mΩ PMOS Power Switch
60mΩ NMOS Synchronous-Rectifier Switch
PART
FBSEL
SHDN
TOFF
LX
LX
LX
FB
IN
IN
IN
10
1
2
3
4
5
6
7
8
9
TEMP. RANGE
-40°C to +85°C
Ordering Information
MAX1623
SSOP
Pin Configuration
20
19
18
17
16
15
14
13
12
11
20 SSOP
PIN-PACKAGE
LX
LX
PGND
LX
PGND
V
COMP
REF
GND
PGND
CC
1
Related parts for MAX1623
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: