MAX5003 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – High-Voltage PWM Power-Supply Controller

19-1555; Rev 0; 12/99
EVAALVUAAILTAIOBNLEKIT
High-Voltage PWM
Power-Supply Controller
General Description
The MAX5003 high-voltage switching power-supply
controller has all the features and building blocks need-
ed for a cost-effective flyback and forward voltage-
mode control converter. This device can be used to
design both isolated and nonisolated power supplies
with multiple output voltages that operate from a wide
range of voltage sources. It includes a high-voltage
internal start-up circuit that operates from a wide 11V to
110V input range. The MAX5003 drives an external N-
channel power MOSFET and has a current-sense pin
that detects overcurrent conditions and turns off the
power switch when the current-limit threshold is
exceeded. The choice of external power MOSFET and
other external components determines output voltage
and power.
The MAX5003 offers some distinctive advantages: soft-
start, undervoltage lockout, external frequency synchro-
nization, and fast input voltage feed-forward. The
device is designed to operate at up to 300kHz switch-
ing frequency. This allows use of miniature magnetic
components and low-profile capacitors. Undervoltage
lockout, soft-start, switching frequency, maximum duty
cycle, and overcurrent protection limit are all adjustable
using a minimum number of external components. In
systems with multiple controllers, the MAX5003 can be
externally synchronized to operate from a common sys-
tem clock.
Warning: The MAX5003 is designed to operate with
high voltages. Exercise caution.
The MAX5003 is available in 16-pin SO and QSOP pack-
ages. An evaluation kit (MAX5003EVKIT) is also available.
Features
o Wide Input Range: 11V to 110V
o Internal High-Voltage Startup Circuit
o Externally Adjustable Settings
Output Switch Current Limit
Oscillator Frequency
Soft-Start
Undervoltage Lockout
Maximum Duty Cycle
o Low External Component Count
o External Frequency Synchronization
o Primary or Secondary Regulation
o Input Feed-Forward for Fast Line-Transient
Response
o Precision ±2.5% Reference over Rated
Temperature Range
Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX5003CEE
0°C to +70°C
16 QSOP
MAX5003CSE
0°C to +70°C
16 Narrow SO
MAX5003C/D
(Note A)
Dice
MAX5003EEE
-40°C to +85°C
16 QSOP
MAX5003ESE
-40°C to +85°C
16 Narrow SO
Note A: Dice are designed to operate over a -40°C to +140°C
junction temperature (T_j) range, but are tested and guaranteed at
T_A = +25°C.
Applications
Telecommunication Power Supplies
ISDN Power Supplies
+42V Automobile Systems
High-Voltage Power-Supply Modules
Industrial Power Supplies
Pin Configuration
TOP VIEW
V+ 1
INDIV 2
ES 3
FREQ 4
SS 5
REF 6
CON 7
COMP 8
MAX5003
16 V_DD
15 V_CC
14 NDRV
13 PGND
12 CS
11 AGND
10 MAXTON
9 FB
QSOP/Narrow SO
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