MAX766ESA Maxim Integrated Products, MAX766ESA Datasheet

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MAX766ESA

Manufacturer Part Number
MAX766ESA
Description
DC/DC Switching Regulators 5/12/15/AdjV DC/DC Inverter
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX766ESA

Output Voltage
- 15 V
Output Current
0.1 A
Input Voltage
3 V to 16.5 V
Switching Frequency
300 KHz
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOIC-8
Minimum Operating Temperature
- 40 C

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The MAX764/MAX765/MAX766 inverting switching regu-
lators are highly efficient over a wide range of load cur-
rents, delivering up to 1.5W. A unique, current-limited,
pulse-frequency-modulated (PFM) control scheme com-
bines the benefits of traditional PFM converters with the
benefits of pulse-width-modulated (PWM) converters.
Like PWM converters, the MAX764/MAX765/MAX766 are
highly efficient at heavy loads. Yet because they are PFM
devices, they use less than 120µA of supply current (vs.
2mA to 10mA for a PWM device).
The input voltage range is 3V to 16V. The output volt-
age is preset at -5V (MAX764), -12V (MAX765), or -15V
(MAX766); it can also be adjusted from -1V to -16V
using two external resistors (Dual Mode
mum operating V
These devices use miniature external components; their
high switching frequencies (up to 300kHz) allow for less
than 5mm diameter surface-mount magnetics. A stan-
dard 47µH inductor is ideal for most applications, so no
magnetics design is necessary.
An internal power MOSFET makes the MAX764/MAX765/
MAX766 ideal for minimum component count, low- and
medium-power applications. For increased output drive
capability or higher output voltages, use the
MAX774/MAX775/MAX776 or MAX1774, which drive an
external power P-channel MOSFET for loads up to 5W.
________________________Applications
19-0176; Rev 0; 6/94
Call toll free 1-800-998-8800 for free samples or literature.
__________Typical Operating Circuit
_______________General Description
3V TO 15V
INPUT
ON/OFF
LCD-Bias Generators
Portable Instruments
LAN Adapters
Remote Data-Acquisition Systems
Battery-Powered Applications
IN
SHDN
REF
________________________________________________________________ Maxim Integrated Products
- V
High-Efficiency, Low I
FB
OUT
MAX764
V+
GND
differential is 20V.
OUT
LX
47µH
TM
). The maxi-
OUTPUT
-5V/-12V/-15V or Adjustable,
-5V
____________________________Features
Ordering Information continued on last page.
* Dice are tested at T
**Contact factory for availability and processing to MIL-STD-883.
__________________Pin Configuration
______________Ordering Information
MAX764CPA
MAX764CSA
MAX764C/D
MAX764EPA
MAX764ESA
MAX764MJA
MAX765CPA
MAX765CSA
MAX765C/D
MAX765EPA
MAX765ESA
MAX765MJA
High Efficiency for a Wide Range of Load Currents
250mA Output Current
120µA Max Supply Current
5µA Max Shutdown Current
3V to 16V Input Voltage Range
-5V (MAX764), -12V (MAX765), -15V (MAX766),
or Adjustable Output from -1V to -16V
Current-Limited PFM Control Scheme
300kHz Switching Frequency
Internal, P-Channel Power MOSFET
TOP VIEW
PART
Q
SHDN
DC-DC Inverters
OUT
REF
FB
A
-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
TEMP. RANGE
= +25°C, DC parameters only.
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
1
2
3
4
MAX764
MAX765
MAX766
DIP/SO
PIN-PACKAGE
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**
LX
V+
V+
GND
1

Related parts for MAX766ESA

MAX766ESA Summary of contents

Page 1

... LX MAX764 SHDN ON/OFF OUT REF FB GND ________________________________________________________________ Maxim Integrated Products Call toll free 1-800-998-8800 for free samples or literature. -5V/-12V/-15V or Adjustable, Q ____________________________Features High Efficiency for a Wide Range of Load Currents 250mA Output Current 120µA Max Supply Current 5µA Max Shutdown Current ...

Page 2

Adjustable, High-Efficiency, Low I ABSOLUTE MAXIMUM RATINGS V+ to GND ..............................................................-0.3V to +17V OUT to GND ...........................................................+0.5V to -17V Maximum Differential (V+ to OUT) ......................................+21V REF, SHDN GND ...............................-0.3V to (V+ + 0.3V V+..................................................................+0.3V ...

Page 3

High-Efficiency, Low I ELECTRICAL CHARACTERISTICS (continued) ( 0mA 0.1µ LOAD REF A PARAMETER SYMBOL LX Leakage Current LX On-Resistance Peak Current PEAK Maximum Switch On-Time t ON Minimum ...

Page 4

Adjustable, High-Efficiency, Low I ____________________________Typical Operating Characteristics (continued) ( -5V +25°C, unless otherwise noted.) OUT A MAXIMUM OUTPUT CURRENT vs. SUPPLY VOLTAGE 600 CIRCUIT OF FIGURE 2 500 V = -5V OUT ...

Page 5

High-Efficiency, Low I ____________________________Typical Operating Characteristics (continued) ( -5V +25°C, unless otherwise noted.) OUT A LX ON-RESISTANCE vs. TEMPERATURE 2.2 2 (V+) = 10V OUT 1.8 1 ...

Page 6

Adjustable, High-Efficiency, Low I ____________________________Typical Operating Characteristics (continued) ( -5V +25°C, unless otherwise noted.) OUT A TIME TO ENTER/EXIT SHUTDOWN 0V 0V 2ms/div CIRCUIT OF FIGURE 5V ...

Page 7

High-Efficiency, Low I ____________________________Typical Operating Characteristics (continued) ( -5V +25°C, unless otherwise noted.) OUT A DISCONTINUOUS CONDUCTION AT HALF CURRENT LIMIT s/div CIRCUIT OF FIGURE 5V ...

Page 8

Adjustable, High-Efficiency, Low I REF SHDN ERROR COMPARATOR Q ONE-SHOT TRIG Q ONE-SHOT Figure 1. Block Diagram _______________Detailed Description Operating Principle The MAX764/MAX765/MAX766 are BiCMOS, inverting, switch-mode power supplies that provide fixed outputs of -5V, -12V, and -15V, ...

Page 9

High-Efficiency, Low I switch is OFF), the range of input and output voltages is limited to a 21V absolute maximum differential voltage. When output voltages more negative than -16V are required, substitute the MAX764/MAX765/MAX766 with Maxim’s MAX774/MAX775/MAX776 or MAX1774, which ...

Page 10

Adjustable, High-Efficiency, Low I Modes of Operation When delivering high output currents, the MAX764/ MAX765/MAX766 operate in continuous-conduction mode. In this mode, current always flows in the induc- tor, and the control circuit adjusts the duty-cycle of the ...

Page 11

High-Efficiency, Low I Reference Capacitor Bypass REF with a 0.1µF capacitor (C3). The REF out- put can source up to 100µA for external loads. Layout Considerations Proper PC board layout is essential to reduce noise generated by high current levels ...

Page 12

... MAX766CPA 0°C to +70°C MAX766CSA 0°C to +70°C MAX766C/D 0°C to +70°C MAX766EPA -40°C to +85°C MAX766ESA -40°C to +85°C MAX766MJA -55°C to +125°C * Dice are tested +25°C, DC parameters only. A **Contact factory for availability and processing to MIL-STD-883. Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied ...

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