MAX738ACWE Maxim Integrated Products, MAX738ACWE Datasheet

IC DCDC CONV PWM STPDN 5V 16SOIC

MAX738ACWE

Manufacturer Part Number
MAX738ACWE
Description
IC DCDC CONV PWM STPDN 5V 16SOIC
Manufacturer
Maxim Integrated Products
Type
Step-Down (Buck)r
Datasheet
1.MAX730ACSA.pdf (16 pages)

Specifications of MAX738ACWE

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
5V
Current - Output
750mA
Frequency - Switching
190kHz
Voltage - Input
6 ~ 16 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.300", 7.5mm Width)
Power - Output
762mW
Output Voltage
5 V
Input Voltage
6 V to 16 V
Supply Current
1.7 mA
Switching Frequency
160 KHz
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Case
SOP
Dc
01+
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
Q737853

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Meier Automation Equipment Co., Limited Meier Automation Equipment Co., Limited
Part Number:
MAX738ACWE
Manufacturer:
MAXIM/美信
Quantity:
20 000
The MAX730A/MAX738A/MAX744A are 5V-output
CMOS, step-down switching regulators. The MAX738A/
MAX744A accept inputs from 6V to 16V and deliver
750mA. The MAX744A guarantees 500mA load capa-
bility for inputs above 6V and has tighter oscillator fre-
quency limits for low-noise (radio) applications. The
MAX730A accepts inputs between 5.2V and 11V and
delivers 450mA for inputs above 6V. Typical efficien-
cies are 85% to 96%. Quiescent supply current is
1.7mA and only 6µA in shutdown.
Pulse-width modulation (PWM) current-mode control
provides precise output regulation and excellent tran-
sient responses. Output voltage accuracy is guaran-
teed to be ±5% over line, load, and temperature varia-
tions. Fixed-frequency switching allows easy filtering of
output ripple and noise, as well as the use of small
external components. These regulators require only a
single inductor value to work in most applications, so
no inductor design is necessary.
The MAX730A/MAX738A/MAX744A also feature cycle-
by-cycle current limiting, overcurrent limiting, undervolt-
age lockout, and programmable soft-start protection.
19-0165; Rev 2; 1/96
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
__________________General Description
__________Typical Operating Circuit
___________________________Applications
6V TO 16V
ON/OFF
INPUT
68 F
Portable Instruments
Cellular Phones and Radios
Personal Communicators
Distributed Power Systems
Computer Peripherals
SHDN
REF
SS
________________________________________________________________ Maxim Integrated Products
MAX738A
MAX744A
V+
GND
Current-Mode PWM DC-DC Converters
OUT
CC
LX
33 H
OUTPUT
100 F
5V
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
_________________Ordering Information
________________________________Features
_________________Pin Configurations
MAX730ACPA
MAX730ACSA
MAX730AC/D
MAX730AEPA
MAX730AESA
MAX730AMJA
TOP VIEW
750mA Load Currents (MAX738A/MAX744A)
High-Frequency, Current-Mode PWM
159kHz to 212.5kHz Guaranteed Oscillator
Frequency Limits (MAX744A)
85% to 96% Efficiencies
1.7mA Quiescent Current
6µA Shutdown Supply Current
Single Preselected Inductor Value,
No Component Design Required
Overcurrent, Soft-Start, and Undervoltage
Lockout Protection
Cycle-by-Cycle Current Limiting
8-Pin DIP/SO Packages (MAX730A)
Pin Configurations continued on last page.
PART
SHDN
REF
CC
SS
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
5V, Step-Down,
1
2
3
4
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
MAX730A
MAX738A
MAX744A
DIP
8
7
6
5
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 CERDIP
V+
LX
GND
OUT
PIN-PACKAGE
1

Related parts for MAX738ACWE

Image
Part Number
Description
Manufacturer
Datasheet
Request R
max738a
Part Number:
max738a
Description:
5v, Step-down, Current-mode Pwm Dc-dc Converters
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
MAX738A.pdf (16 pages)
MAX738
Part Number:
MAX738
Description:
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX738.pdf (1 page)
MAX7528KCWP
Part Number:
MAX7528KCWP
Description:
MAX7528KCWPMaxim Integrated Products [CMOS Dual 8-Bit Buffered Multiplying DACs]
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX7528KCWP.pdf (12 pages)
MAX3261CCJ
Part Number:
MAX3261CCJ
Description:
Single +5V, fully integrated, 1.25Gbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX3261CCJ.pdf (12 pages)
MAX3263CAG
Part Number:
MAX3263CAG
Description:
Single +5V, fully integrated, 155Mbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX3263CAG.pdf (12 pages)
MAX8809AETL+
Part Number:
MAX8809AETL+
Description:
VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM Controllers with Integrated Dual MOSFET Drivers
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX8809AETL.pdf (50 pages)
MAX1535CETJ+T
Part Number:
MAX1535CETJ+T
Description:
Highly Integrated Level 2 SMBus Battery Chargers
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX1535CETJT.pdf (39 pages)
DS2741N+
Part Number:
DS2741N+
Description:
Current Monitor and Accumulator with Integrated Sense Resistor; ; Temperature Range: -40°C to +85°C
Manufacturer:
Maxim Integrated Products
MAX13450EAUD+T
Part Number:
MAX13450EAUD+T
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
MAX13451EAUD+T
Part Number:
MAX13451EAUD+T
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
MAX17497BATE+
Part Number:
MAX17497BATE+
Description:
QFN 16/A°/AC-DC and DC-DC Peak-Current-Mode Converters with Integrated Step
Manufacturer:
Maxim Integrated Products
MAX17502FATB+T
Part Number:
MAX17502FATB+T
Description:
TDFN/A/65V, 1A, 600KHZ, SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED SWI
Manufacturer:
Maxim Integrated Products
MAX1978EVKIT
Part Number:
MAX1978EVKIT
Description:
Integrated Temperature Controller f
Manufacturer:
Maxim Integrated Products
MAX2606EUT+
Part Number:
MAX2606EUT+
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
MAX2608EUT+
Part Number:
MAX2608EUT+
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products

MAX738ACWE Summary of contents

Page 1

... MAX744A ON/OFF SHDN OUT REF CC SS GND ________________________________________________________________ Maxim Integrated Products For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 ________________________________Features 750mA Load Currents (MAX738A/MAX744A) High-Frequency, Current-Mode PWM 159kHz to 212.5kHz Guaranteed Oscillator Frequency Limits (MAX744A) 85% to 96% Efficiencies 1.7mA Quiescent Current 6µ ...

Page 2

Step-Down, Current-Mode PWM DC-DC Converters ABSOLUTE MAXIMUM RATINGS Pin Voltages V+ (MAX730A) ......................................................+12V, -0.3V V+ (MAX738A/MAX744A) .....................................+18V, -0.3V LX (MAX730A) .................................(V+ - 12V) to (V+ + 0.3V) LX (MAX738A/MAX744A) ................(V+ - 21V) to (V+ + 0.3V) OUT .................................................................................±25V SS, ...

Page 3

Current-Mode PWM DC-DC Converters ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure for the MAX730A 12V for the MAX738A/MAX744A, I unless otherwise noted.) PARAMETER CONDITIONS I = 0mA to 300mA LOAD Load Regulation I = 0mA ...

Page 4

Step-Down, Current-Mode PWM DC-DC Converters __________________________________________Typical Operating Characteristics (Circuit of Figure +25°C, unless otherwise noted.) A MAX730A EFFICIENCY vs. OUTPUT CURRENT 100 (NOTES 5. ...

Page 5

Current-Mode PWM DC-DC Converters ____________________________Typical Operating Characteristics (continued) (Circuit of Figure +25°C, unless otherwise noted.) A OSCILLATOR FREQUENCY vs. SUPPLY VOLTAGE 220 210 MAX730A 200 190 180 170 160 MAX738A 150 SUPPLY VOLTAGE ...

Page 6

Step-Down, Current-Mode PWM DC-DC Converters ____________________________Typical Operating Characteristics (continued) (Circuit of Figure +25°C, unless otherwise noted.) A MAX738A/MAX744A SWITCHING WAVEFORMS, CONTINUOUS CONDITION 2 s/div A: SWITCH VOLTAGE (LX PIN), 5V/div +12V B: INDUCTOR CURRENT, ...

Page 7

Current-Mode PWM DC-DC Converters ____________________________Typical Operating Characteristics (continued) (Circuit of Figure +25°C, unless otherwise noted.) A MAX730A LOAD-TRANSIENT RESPONSE 50ms/div A: V OUT , 50mV/div, DC-COUPLED B: I OUT , 200mA/div, 20mA TO 300mA ...

Page 8

Step-Down, Current-Mode PWM DC-DC Converters _________________Detailed Description The MAX730A/MAX738A/MAX744A switch-mode regu- lators use a current-mode pulse-width-modulation (PWM) control system coupled with a simple step-down (buck) regulator topography. They convert an unregu- lated DC voltage from 5.2V to 11V for ...

Page 9

Current-Mode PWM DC-DC Converters Table 1. Typical Soft-Start Times MAX730A CIRCUIT CONDITIONS R1 (kΩ) V+ (V) I OUT 510 6 510 9 510 11 510 9 150 510 9 300 510 9 150 510 9 150 None 6 None 9 ...

Page 10

Step-Down, Current-Mode PWM DC-DC Converters SHDN BIAS GEN OUT C5 ERROR AMP 330pF CC 1.23V R1 BANDGAP 510k REF C6 0. ±35 0.1 F GND *SEE TABLE 2 FOR COMPONENT VALUES AND SUPPLIERS Figure 1. ...

Page 11

Current-Mode PWM DC-DC Converters Table 2. Component Values and Suppliers MAX730AC/MAX738AC/MAX744AC Production Commercial Temp. Range Method Inductors L1 = 33µH to 100µH Sumida (708) 956-0666 CD54-101KC (MAX730AC) Surface CD105-101KC Mount (MAX738AC/MAX744AC) Coiltronics (407) 241-7876 CTX100 series L1 = 33µH to ...

Page 12

Step-Down, Current-Mode PWM DC-DC Converters FROM SHDN R1 SS CLAMP 510k SS 1M ±35% C1 1.23V MAX730A MAX738A MAX744A Figure 2. Block Diagram of Soft-Start Circuitry MAX730A +5.2V TO +11.0V MAX738A/MAX744A +6.0V TO +16. ...

Page 13

Current-Mode PWM DC-DC Converters MAX730 EVALUATION KIT Figure 4. DIP PC Layout, Through-Hole Component Placement Diagram (1x scale) Figure 6. DIP PC Layout, Solder Side (1x scale) ______________________________________________________________________________________ 5V, Step-Down, Figure 5. DIP PC Layout, Component Side (1x scale) Figure ...

Page 14

... Wide SO __________________________________________________________Chip Topographies MAX730A SHDN V+ REF SS OUT CC 0.072" (1.828mm) TRANSISTOR COUNT: 274 (MAX730A) 286 (MAX738A/MAX744A); SUBSTRATE CONNECTED TO V+. 14 ______________________________________________________________________________________ __Ordering Information (continued) PART MAX738ACPA MAX738ACWE V+ MAX738AC/D LX MAX738AEPA GND MAX738AEWE OUT MAX738AMJA MAX744ACPA MAX744ACWE MAX744AC/D V+ MAX744AEPA V+ MAX744AEWE LX MAX744AMJA LX *Contact factory for dice specifications. ...

Page 15

Current-Mode PWM DC-DC Converters ________________________________________________________Package Information ______________________________________________________________________________________ 45˚ 0.127mm 0.004in 5V, Step-Down, ...

Page 16

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © 1996 Maxim Integrated Products ...

Related keywords