MAX762CSA+ Maxim Integrated Products, MAX762CSA+ Datasheet

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MAX762CSA+

Manufacturer Part Number
MAX762CSA+
Description
IC CONV DC/DC 15V STEP UP 8SOIC
Manufacturer
Maxim Integrated Products
Type
Step-Up (Boost)r
Datasheet

Specifications of MAX762CSA+

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
15V, 5 ~ 16.5 V
Current - Output
150mA
Frequency - Switching
300kHz
Voltage - Input
2 ~ 16.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Power - Output
471mW
Output Voltage
15 V
Input Voltage
5 V
Supply Current
0.11 mA
Switching Frequency
300 KHz
Mounting Style
SMD/SMT
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX761/MAX762 step-up switching regulators
provide high efficiency over a wide range of load currents,
delivering up to 150mA. A unique, current-limited
pulse-frequency-modulated (PFM) control scheme gives
the devices the benefits of pulse-width-modulated (PWM)
converters (high efficiency with heavy loads), while using
less than 110µA of supply current (vs. 2mA to 10mA for
PWM converters). The result is high efficiency over a wide
range of loads.
The MAX761/MAX762 input voltage range is 2V to 16.5V.
Output voltages are preset to 12V (MAX761) and 15V
(MAX762), or they can be set with two external resistors.
With a 5V input, the MAX761 guarantees a 12V, 150mA
output. Its high efficiency, low supply current, fast start-up
time, SHDN controlling capability, and small size make the
MAX761 ideal for powering flash memory.
The MAX761/MAX762 have an internal 1A power MOS-
FET, making them ideal for minimum-component, low- and
medium-power applications. These devices use tiny exter-
nal components, and their high switching frequencies (up
to 300kHz) allow for small surface-mount magnetics.
For increased output drive capability or higher output volt-
ages, use the MAX770–MAX773, which are similar in
design to the MAX761/MAX762, but drive external power
MOSFETs. For stepping up to 5V, see the MAX756/
MAX757 and MAX856-MAX859 data sheets.
19-0201; Rev 0; 11/93
_________________________Applications
Call toll free 1-800-998-8800 for free samples or literature.
__________Typical Operating Circuit
_______________General Description
TO 12V
Flash Memory Programming
PCMCIA Cards
Battery-Powered Applications
High-Efficiency DC-DC Converters
INPUT
4.75V
DETECTOR INPUT
LOW-BATTERY
ON/OFF
33µF
________________________________________________________________ Maxim Integrated Products
SHDN
LBI
REF
12V/15V or Adjustable, High-Efficiency,
FB
MAX761
GND
LBO
LX
V+
Low I
18µH
LOW-BATTERY
DETECTOR OUTPUT
OUTPUT
150mA
33µF
Q
12V
, Step-Up DC-DC Converters
____________________________Features
* Contact factory for dice specifications.
** Contact factory for availability and processing to MIL-STD-883.
__________________Pin Configuration
______________Ordering Information
MAX761CPA
MAX761CSA
MAX761C/D
MAX761EPA
MAX761ESA
MAX761MJA
MAX762CPA
MAX762CSA
MAX762C/D
MAX762EPA
MAX762ESA
MAX762MJA
High Efficiency for a Wide Range of Load Currents
12V/150mA Flash Memory Programming Supply
110µA Max Supply Current
5µA Max Shutdown Supply Current
2V to 16.5V Input Voltage Range
12V (MAX761), 15V (MAX762) or Adjustable Output
Current-Limited PFM Control Scheme
300kHz Switching Frequency
Internal, 1A, N-Channel Power FET
LBI/LBO Low-Battery Comparator
TOP VIEW
PART
SHDN
LBO
LBI
FB
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
1
2
3
4
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
MAX761
MAX762
DIP/SO
8
7
6
5
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 CERDIP**
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 CERDIP**
V+
LX
GND
REF
PIN-PACKAGE
1

Related parts for MAX762CSA+

MAX762CSA+ Summary of contents

Page 1

... ON/OFF LBI LOW-BATTERY LBO DETECTOR INPUT REF FB GND ________________________________________________________________ Maxim Integrated Products Call toll free 1-800-998-8800 for free samples or literature. , Step-Up DC-DC Converters Q ____________________________Features High Efficiency for a Wide Range of Load Currents 12V/150mA Flash Memory Programming Supply 110µA Max Supply Current 5µ ...

Page 2

Adjustable, High-Efficiency, Low I , Step-Up DC-DC Converters Q ABSOLUTE MAXIMUM RATINGS Supply Voltage V+ to GND .......................................-0.3V to 17V REF, LBO, LBI, SHDN, FB ............................-0.3V to (V+ + 0.3V) LX..............................................................................-0.3V to 17V LX Peak Current ....................................................................1.5A LBO ...

Page 3

Adjustable, High-Efficiency, Low I ELECTRICAL CHARACTERISTICS (continued) ( 0mA 0.1µ LOAD REF A PARAMETER SYMBOL Reference Load Regulation Reference Line Regulation LX Leakage Current FB Leakage Current I FB ...

Page 4

Adjustable, High-Efficiency, Low I , Step-Up DC-DC Converters Q __________________________________________Typical Operating Characteristics (Circuit of Figure +25°C, unless otherwise noted.) A EFFICIENCY vs. OUTPUT CURRENT BOOTSTRAPPED 100 V = 10V ...

Page 5

Adjustable, High-Efficiency, Low I ____________________________Typical Operating Characteristics (continued) (Circuit of Figure +25°C, unless otherwise noted LEAKAGE vs. TEMPERATURE 1000 V+ = 15V 100 16. ...

Page 6

Adjustable, High-Efficiency, Low I , Step-Up DC-DC Converters Q _____________________________Typical Operating Characteristics (continued) (Circuit of Figure +25°C, unless otherwise noted.) A LOAD–TRANSIENT RESPONSE 5µs/div (0mA to 200mA) LOAD ...

Page 7

Adjustable, High-Efficiency, Low I LBO LBI LBI REF Q ONE-SHOT TRIG ONE-SHOT CURRENT CONTROL CIRCUITRY Figure 1. Simple Block Diagram ________________Detailed Description Operating Principle The MAX761/MAX762 BiCMOS step-up switch-mode power supplies provide fixed outputs of ...

Page 8

Adjustable, High-Efficiency, Low I , Step-Up DC-DC Converters 18µH 1N5817 +5V C1 33µ REF C3 MAX761 0.1µ SHDN LBI LBO ...

Page 9

Adjustable, High-Efficiency, Low I Figure 4a. CCM, Heavy Load Current Waveform (500mA/div) used in a bootstrapped circuit (Figure 5), undervoltage lockout prevents start-up at low input voltages; but once started, operation can continue down to a lower voltage ...

Page 10

Adjustable, High-Efficiency, Low I , Step-Up DC-DC Converters 1N5817 18µ MAX761 REF MAX762 C3 2 LBI SHDN GND C1 = 33µ ...

Page 11

Adjustable, High-Efficiency, Low I Reference Capacitor Bypass REF with a 0.1µF capacitor. REF can source up to 100µA. Setting the Low-Battery Detector Voltage To set the low-battery detector’s falling trip voltage (V ), select R3 between 10kΩ and ...

Page 12

... 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. 12 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © 1993 Maxim Integrated Products LX 0.142" ...

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