sc1464cms.tr Semtech Corporation, sc1464cms.tr Datasheet

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sc1464cms.tr

Manufacturer Part Number
sc1464cms.tr
Description
60ma Programmable Fixed Frequency Charge Pump Doubler
Manufacturer
Semtech Corporation
Datasheet
1.SC1464CMS.TR.pdf (10 pages)
PRELIMINARY - August 11, 2000
DESCRIPTION
The SC1464 is a versatile charge pump designed for
use in battery operated power supply applications. A
simple, low current charge pump doubler can be imple-
mented without costly inductors or capacitors. Internal
MOSFET’s and control circuitry eliminate the need for
costly board space and design time. The small device
footprint allows for compact circuit design.
The SC1464 charge pump can be used for applications
that require up to 60mA of output current with V
2.85V and V
package helps minimize board space.
The TF1 and TF2 pins provide binary control of the
oscillator frequency to either 1 MHz, 260kHz, 32kHz or
8kHz. The user can change the frequency during oper-
ation with extremely fast settling time.
APPLICATION CIRCUIT
© 2000 SEMTECH CORP.
Cin
Vin =3 V +/- 5%
OUT
= 5.2V. The small 8 lead MSOP-8
Logic Input or Vin
Iout
60mA
20mA
60mA
20mA
TF1
TF2
Freq
260kHz
260kHz
1MHz
1MHz
60mA PROGRAMMABLE FIXED
FREQUENCY CHARGE PUMP DOUBLER
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
7
4
1
2
U1
SC1464
Cin
3.3uF
1.0uF
1.0uF
0.22uF
IN
Vin
EN
TF1
TF2
=
FEATURES
=
=
=
=
=
=
=
=
=
=
APPLICATIONS
=
=
=
=
ORDERING INFORMATION
Note:
(1) Only available in tape and reel packaging. A reel
contains 2500 devices.
C+
652 MITCHELL ROAD NEWBURY PARK CA 91320
Vo
C-
capacitors
Small size - MSOP-8 package
Typical efficiency of 90% @ full load
Designed to work with ceramic or tantalum
Soft start functionality
Short-Circuit and Over-Temperature protection
<55µA input current @ no load (TF1=0;TF2=1)
<330µA input current @ no load (TF1=0;TF2=0)
Oscillator frequency accurate to ±5%
Shutdown current < 1µA
All Specifications rated over the full temperature
range (-40°C to 85 °C)
Cellular phones
Handheld devices
PDA power supplies
Peripheral card supplies
SC1464CMS.TR
3.3uF
1.0uF
1.0uF
0.22uF
Part Number
Cout
3
5
6
CBucket
(1)
CBucket
0.22uF
0.22uF
0.10uF
Vo =5.2 V to 6.2 V
2.2uF
Package
MSOP-8
Cout
SC1464
1

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sc1464cms.tr Summary of contents

Page 1

... All Specifications rated over the full temperature range (-40° °C) APPLICATIONS = Cellular phones = Handheld devices = PDA power supplies = Peripheral card supplies ORDERING INFORMATION Part Number SC1464CMS.TR Note: (1) Only available in tape and reel packaging. A reel contains 2500 devices. U1 SC1464 7 3 Vin ...

Page 2

PRELIMINARY - August 11, 2000 ABSOLUTE MAXIMUM RATINGS Parameter Input Supply Voltage Output Voltage V Short-Circuit Duration OUT Operating Ambient Temperature Range Operating Junction Temperature Storage Temperature Range Lead Temperature (Soldering) 10 Sec Thermal Temperature Junction to Ambient Thermal Impedance ...

Page 3

PRELIMINARY - August 11, 2000 ELECTRICAL CHARACTERISTICS Unless specified -40° 85° Parameter Symbol Time to Regulation (2)(3) Turn-on Input High Threshold V ih Input Low Threshold V il ...

Page 4

PRELIMINARY - August 11, 2000 BLOCK DIAGRAM Thermal Shut Down PIN CONFIGURATION Top View (MSOP-8) PIN DESCRIPTION Pin# Pin Name Pin Function 1 TF1 Binary frequency select pins. The frequency is set according to the following table. 2 TF2 3 ...

Page 5

PRELIMINARY - August 11, 2000 Eff vs Vo (260kHz) 96.00% 94.00% 92.00% 90.00% 4.50 5.00 5.50 6.00 Vo (V) Eff vs Vin (260kHz) 96.00% 94.00% 92.00% 90.00% 2.50 2.70 2.90 3. (V) Iin vs Io (260kH z) 140.0E-3 ...

Page 6

PRELIMINARY - August 11, 2000 Vo vs Vin (260kHz) 7.000 6.500 6.000 5.500 5.000 4.500 4.000 2.50 2.70 2.90 3.10 Vin (V) © 2000 SEMTECH CORP. 60mA PROGRAMMABLE FIXED FREQUENCY CHARGE PUMP DOUBLER ...

Page 7

PRELIMINARY - August 11, 2000 Iin vs Ta (8kHz 0mA 60.0E-6 55.0E-6 50.0E-6 45.0E-6 40.0E-6 35.0E-6 30.0E-6 25.0E-6 -40 - (Deg. C.) Iin vs Ta (32kHz 0mA 320.0E-6 300.0E-6 280.0E-6 ...

Page 8

PRELIMINARY - August 11, 2000 (8Khz) @ Vin = 3.00 V 6.2 6.15 6.1 6.05 6 5.95 5.9 5.85 5.8 -40.00 -20.00 0.00 20.00 40.00 60.00 Ta (Deg. C (32Khz) @ Vin = 3.00 ...

Page 9

PRELIMINARY - August 11, 2000 Eff vs Io (260kHz) @ Vin =3.00V 95.80 Deg. C. 95.60 -40 Deg Deg. C. 95.40% 95.20% 95.00% 94.80% 94.60% 94.40% 94.20% 94.00% 1.50E-02 2.50E-02 3.50E-02 ...

Page 10

PRELIMINARY - August 11, 2000 OUTLINE DRAWING - MSOP-8 LAND PATTERN - MSOP-8 ECN 00-1246 © 2000 SEMTECH CORP. 60mA PROGRAMMABLE FIXED FREQUENCY CHARGE PUMP DOUBLER 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1464 10 ...

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