MAX8704 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – High-Current, Low-Voltage Linear Regulator with Power-Limited, External MOSFET

19-3420; Rev 0; 9/04
EVALUATION ^{KIT AVAILABLE}
High-Current, Low-Voltage Linear Regulator
with Power-Limited, External MOSFET
General Description
The MAX8704 high-current linear regulator uses an
external n-channel MOSFET to generate low-voltage
supplies for notebook computers. This linear regulator
delivers an output voltage as low as 0.5V from an input
voltage as low as 1.0V. Normally, this low input require-
ment would make the design of such a regulator very dif-
ficult. In this application, the 5V bias supply that is
always available in the system powers the MAX8704 dri-
ver and control circuitry.
The MAX8704 includes a fixed current limit and an
adjustable power limit to protect the external MOSFET
from overheating. Additionally, the MAX8704 includes
an internal thermal limit to prevent damage to the con-
troller and provide remote thermal protection for the
external MOSFET.
The MAX8704 features an adjustable soft-start function
and generates a delayed power-good (PGOOD) signal
that signals when the linear regulator is in regulation.
The MAX8704 is available in a 10-pin µMAX^® package.
Features
♦ Low-Cost, High-Current Linear Regulator
♦ External MOSFET Protection
MOSFET Power Limit
50mV (typ) Current Limit
Thermal Limit
♦ 1.0V to 5.5V Input Supply Voltage
♦ 1.2V or 1.5V Preset, or Adjustable Output Voltage
♦ Power-Good (PGOOD) Open-Drain Output with
3ms Startup Delay
♦ Programmable Soft-Start
♦ Shutdown with Output Discharge
Applications
V_MCH and V_CCP CPU Supplies
Notebook Computers
Desktop Computers
Servers
VID Power Supplies
Low-Voltage Bias Supplies
PART
MAX8704EUB
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
10 µMAX
Pin Configuration
TOP VIEW
V_IN 1
V_CC 2
PGOOD 3
PLIM 4
SS/EN 5
MAX8704
µMAX
10 DRV
9 GND
8 CSP
7 CSN
6 FB
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.