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PDF SC1406 Data sheet ( Hoja de datos )
| Número de pieza | SC1406 | |
| Descripción | PORTABLE PENTIUM II & III POWER SUPPLY CONTROLLER | |
| Fabricantes | Semtech Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SC1406 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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PORTABLE PENTIUM® II & III
POWER SUPPLY CONTROLLER
SC1406
PRELIMINARY - August 27, 1999
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC1406 is a High Speed, High performance Hys-
teretic Mode controller. It is part of a two chip solution,
with the SC1405 Smart Driver, providing power to ad-
vanced micro-processors. It uses a Dynamic Set Point
switching technique along with an ultra-fast compara-
tor to provide the control signal to an external high
speed Mosfet driver. A 5-bit DAC sets the output volt-
age, thus providing a voltage resolution of 25mV.
SC1406 has two on-chip linear regulators which drive
external PNP transistors with output voltage settings
of 1.5V and 2.5Vdc. The linear regulator drivers have
a separate soft start. A PWRGD TTL level signal is
asserted when all voltages are within specifications.
The part features Low Battery Detect and Undervolt-
age Lock-Out for the main Hysteretic controller to as-
sure V-DC is within acceptable limits. An Over-Current
comparator disables the main controller during an
overcurrent condition using an externally pro-
grammable threshold.
FEATURES
• High Speed Hysteretic controller provides high
efficiency over a wide operating load range
• Inherently stable
• Complete power solution with two LDO drivers
• Programmable output voltage for Pentium® II & III
Processors
APPLICATIONS
• Laptop and Notebook computers
• High performance Microprocessor based systems
• High efficiency distributed power supplies
ORDERING INFORMATION
DEVICE
SC1406TS
PACKAGE
TSSOP-28
TEMP. (TJ)
0 - 125°C
PIN CONFIGURATION
BLOCK DIAGRAM
Top View
TSSOP-28
© 1999 SEMTECH CORP.
Pentium is a registered trademark of Intel Corporation
1
652 MITCHELL ROAD NEWBURY PARK CA 91320
1 page  
PORTABLE PENTIUM® II & III
POWER SUPPLY CONTROLLER
SC1406
PRELIMINARY - August 27, 1999
ELECTRICAL CHARACTERISTICS (CONT.)
Unless specified: -0 < TA < 100°C; VCC = 3.3V (See test circuit)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Current Limit Comparator (CL, CLREF, CLSET)
Input Bias Current
Current Limit Setting Current
+ICL
|+ICLREF|
*The Tamky device is required to
meet the CL setting current
requirements for RCLSET of
“17kΩ and 170kΩ or “42.5kΩ and
20kΩ”. Supplier production testing
will use the 17kΩ /170kΩ
combination or the 42.5kΩ /20kΩ
combination.
Input Offset Voltage
Propagation Delay Time**
Measured at the device pins, from
the trip point to 50% of CO
transition
VCL -
VCLREF
Tpd_CL-CO
VCS = 1.3V
RCLSET = open
RCLSET = 17kΩ∗
5
VCLREF-VCL
= 10mV
7.5
VCLRER-VCL
= -10mV
5.0
VCLREF-VCL 262.5 300 337.5
= 10mV
VCLREF-VCL 175 200 225
= -10mV
RCLSET = 170kΩ∗
VCLREF-VCL 19.5 30 40.5
= 10mV
VCLREF-VCL 13 20 27
= -10mV
RCLSET = 42.5kΩ∗
VCLRER-VCL 100.5 120 139.5
= 10mV
VCLRER-VCL 67 80 93
= -10mV
RCLSET = 20kΩ∗
VCLREF-VCL 222 255 288
= 10mV
VCLRER-VCL 148 170 192
= -10mV
VCLREF = 1.3V
±4 ±6
VCMPREF = 1.3V, ∆ VCMP = +50mV
step with +20mV overdrive,
TA = 25°C,
TA = full range
VCMPREF = 1.3V, ∆ VCMP =
-50mV step with -20mV overdrive,
TA = 25°C,
100
150
100
µA
µA
µA
µA
µA
µA
mV
ns
TA = full range
150
© 1999 SEMTECH CORP.
Pentium is a registered trademark of Intel Corporation
5
652 MITCHELL ROAD NEWBURY PARK CA 91320
5 Page 
PORTABLE PENTIUM® II & III
POWER SUPPLY CONTROLLER
PRELIMINARY - August 27, 1999
OUTLINE DRAWING - TSSOP-28
SC1406
© 1999 SEMTECH CORP.
Pentium is a registered trademark of Intel Corporation
11
652 MITCHELL ROAD NEWBURY PARK CA 91320
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet SC1406.PDF ] | |
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