MAX8523 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – High-Speed, Dual-Phase Gate Driver for Multiphase, Step-Down Converters

19-2860; Rev 0; 4/03
16-QSOP
9mm _{x 6m}
High-Speed, Dual-Phase Gate Driver for
Multiphase, Step-Down Converters
General Description
The MAX8523 dual-phase gate driver, along with the
MAX8524*/MAX8525 multiphase controllers, provides
flexible 2- to 8-phase CPU core-voltage supplies. The
0.5Ω/0.95Ω driver resistance allows up to 30A output
current per phase.
Each MOSFET driver in the MAX8523 is capable of dri-
ving 3000pF capacitive loads with only 15ns propaga-
tion delay and 11ns typical rise and fall times, allowing
operations up to 1.2MHz per phase. Adaptive dead
time controls low-side MOSFET turn-on, and user-pro-
grammable dead time controls high-side MOSFET turn-
on. This maximizes converter efficiency while allowing
operation with a variety of MOSFETs and controller ICs.
An undervoltage lockout (UVLO) circuit allows proper
power-on sequencing. PWM_ signal inputs are both
TTL and CMOS compatible.
The MAX8523 is available in a space-saving 16-pin QSOP
package, and specified for -40°C to +85°C operation.
Applications
Core Voltage Supplies for Pentium™ IV
Microprocessors
Servers and Workstations
Desktop Computers
Voltage Regulator Modules (VRMs)
DC-to-DC Regulator Modules
Switches, Routers, and Storage
Features
o 6A Peak Gate-Drive Current
o Up to 1.2MHz Operation
o Up to 6.5V Gate-Drive Voltage
o 0.5Ω/0.95Ω Low-Side Drivers
o Capable of 30A Output per Phase
o Adaptive Shoot-Through Protection
o User-Programmable Delay Time
o TTL and CMOS Input Compatible
o UVLO for Proper Sequencing
o Flexible 2- to 8-Phase Implementation with
MAX8524 and MAX8525
o Space-Saving (4.9mm ✕ 6mm) 16-Pin QSOP
Package
PART
MAX8523EEE
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
16 QSOP
*Future product. Contact factory for availability.
Typical Operating Circuit
3V TO 13.2V
+4.5V TO +6.5V GATE
DRIVE SUPPLY
PHASE 1 OUTPUT
1 _BST1
2 _DH1
3 _LX1
5 _DL1
6 _PGND1
4 _PV1
13 _PV2
8 _DLY
MAX8523
7
VCC
BST2 ¹⁶
15
DH2
LX2 ¹⁴
DL2 ¹²
PGND2 ¹¹
PWM2 ¹⁰
9
PWM1
PHASE 2 OUTPUT
PHASE 2 PWM INPUT
PHASE 1 PWM INPUT
Pentium is a trademark of Intel Corp.
________________________________________________________________ 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.