Product Summary

The MAX845ESA provides an isolated power supply small enough to fit in thin PCMCIA cards and space-sensitive applications. MAX845ESA drives a low-profile center-tapped transformer primary from a 5V or 3.3V DC power supply. The secondary can be wound to provide any isolated positive or negative voltage at powers up to 750mW. The MAX845ESA consists of an oscillator followed by a toggle flip-flop. The flip-flop generates two 50% duty-cycle square waves, which are complementary at half the oscillator frequency (450kHz, min).

Parametrics

MAX845ESA absolute maximum ratings: (1)Supply Voltage (VCC): -0.3V to +7V; (2)Control Input Voltage (SD, FS): -0.3V to (VCC + 0.3V); (3)Peak Output Switch Current (D1, D2): 1A; (4)Output Switch Voltage (D1, D2): 12V; (5)Average Output Switch Current (D1, D2): 200mA; (6)Operating Temperature Range: -40℃ to +85℃; (7)Storage Temperature Range: -65℃ to +160℃; (8)Junction Temperature: +150℃; (9)Lead Temperature (soldering, 10sec): +300℃.

Features

MAX845ESA features: (1)Transformer Driver for Ultra-Thin 5V-μs Transformers; (2)Isolated DC-to-DC Power Supply for PCMCIA Applications; (3)450kHz Minimum Switching Frequency; (4)Ultra-Low Input Supply Current Ripple; (5)Single +5V or +3.3V Supply; (6)5μW Low-Power Shutdown Mode; (7)8-Pin SO and μMAX Packages; (8)Low Output Ripple Permits Miniature Output Capacitors.

Diagrams

MAX845ESA test circuit

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
MAX845ESA
MAX845ESA

Maxim Integrated Products

Power Driver ICs

Data Sheet

Negotiable 
MAX845ESA/GH9
MAX845ESA/GH9

Maxim Integrated Products

Power Driver ICs

Data Sheet

Negotiable 
MAX845ESA+T
MAX845ESA+T

Maxim Integrated Products

Power Driver ICs Isolated Transformer Driver for PCMCIA

Data Sheet

0-1: $2.68
1-25: $1.98
25-50: $1.94
50-100: $1.71
MAX845ESA+
MAX845ESA+

Maxim Integrated Products

Power Driver ICs Isolated Transformer Driver for PCMCIA

Data Sheet

0-1: $2.77
1-25: $1.85
25-50: $1.35
50-100: $1.33
MAX845ESA/GH9-T
MAX845ESA/GH9-T

Maxim Integrated Products

Power Driver ICs

Data Sheet

Negotiable 
MAX845ESA-T
MAX845ESA-T

Maxim Integrated Products

Power Driver ICs

Data Sheet

Negotiable