AMS34063S Advanced Monolithic Systems, AMS34063S Datasheet

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AMS34063S

Manufacturer Part Number
AMS34063S
Description
Manufacturer
Advanced Monolithic Systems
Datasheet

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Part Number:
AMS34063S
Quantity:
1 400
FEATURES
GENERAL DESCRIPTION
The AMS34063 series is a control circuit containing the basic functions required for DC-to-DC converters. The device consists
of an internal temperature compensated reference, a comparator, a controlled duty cycle oscillator with an active current limit
circuit, a driver and a high current output switch. Designed specifically to be incorporated in Step-Up, Step-Down and Voltage
-Inverting applications, the AMS34063 requires a minimum number of external components.
The AMS34063 is available in the 8-lead plastic SOIC and 8-lead plastic DIP packages.
ORDERING INFORMATION
AMS34063P
PIN CONNECTIONS
8 LEAD PDIP
Wide Input Voltage Operating Range from 2.5V to 40V
Low Standby Current
Current Limiting
Output Switch Current of 1.5A
Output Voltage Adjustable from 1.25 to 40V
Frequency of Operation to 100kHz
Advanced
Monolithic
Systems
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com
PACKAGE TYPE
8 LEAD SOIC/ 8 LEAD PDIP
COLLECTOR
CAPACITOR
EMITTER
SWITCH
SWITCH
TIMING
AMS34063S
8 LEAD SOIC
GND
1
2
3
4
Top View
8
7
6
5
DRIVER
COLLECTOR
V
COMPARATOR
INVERTING
INPUT
I
PK
CC
SENSE
-40 C to +85 C
OPER. TEMP
RANGE
DC-TO-DC CONVERTER CONTROL CIRCUIT
APPLICATIONS
Step-Up Converter
Step-Down Converter
Voltage Inverting Application
Phone (925) 443-0722 Fax (925) 443-0723
AMS34063

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AMS34063S Summary of contents

Page 1

... AMS34063 requires a minimum number of external components. The AMS34063 is available in the 8-lead plastic SOIC and 8-lead plastic DIP packages. ORDERING INFORMATION PACKAGE TYPE 8 LEAD PDIP 8 LEAD SOIC AMS34063P AMS34063S PIN CONNECTIONS 8 LEAD SOIC/ 8 LEAD PDIP SWITCH 1 8 COLLECTOR SWITCH ...

Page 2

... Note 3: Power dissipation equal to 1.0W for the 8 lead P DIP package and 625mW for the SO-8 package. For operation at temperatures above derate the power dissipation at 10mW Advanced Monolithic Systems, Inc. www.advanced-monolithic.com (Note 1) 40V Driver Collector Voltage, V -0.3V to +40V Switch Current, I ...

Page 3

... Pin 5 = GND 100 10 1.0 0.1 1.0 OSCILLATOR TIMING CAPACITOR Emitter-Follower Configuration Output Switch Saturation Voltage vs Emitter Current 1 5.0V CC Pins 1,7 1.5 Pin 3,5 = GND 1.4 1.3 1.2 1.1 1.0 0.2 0.4 0.6 0.8 1.0 0 EMITTER CURRENT (A) Advanced Monolithic Systems, Inc. www.advanced-monolithic.com DRIVE 170 7 I SENSE OSC 1.25V + COMP. REF - REG ...

Page 4

... TYPICAL APPLICATIONS V IN 25V Test Line Regulation Load Regulation Output Ripple Short Circuit Current Efficiency External Current Boost Connections for I a. External NPN Switch Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Step-Down Converter OSC SC 0.33 ...

Page 5

... F Test Line Regulation Load Regulation Output Ripple Short Circuit Current Efficiency External Current Boost Connections for I a. External NPN Switch Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Step-Up Converter 170 180 OSC ...

Page 6

... Desired peak-to-peak output ripple voltage. In practice, the calculated value will need to be increased due to the ripple(P-P) capacitor’s equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly effect the line and load regulation. Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Design Formula Table Step-Down V ...

Page 7

... TYP 0.005 (0.127) MIN 0.100±0.010 (2.540±0.254) *DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTUSIONS. MOLD FLASH OR PROTUSIONS SHALL NOT EXCEED 0.010" (0.254mm) Advanced Monolithic Systems, Inc. www.advanced-monolithic.com 8 LEAD SOIC PLASTIC PACKAGE (S) 0.189-0.197* (4.801-5.004 0.150-0.157** (3 ...

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