MAX845ESA+ Maxim Integrated Products, MAX845ESA+ Datasheet - Page 4

• Manufacturer Part Number: MAX845ESA+
• Description: IC DRVR XFRMR CMOS PCMCIA 8SOIC
• Manufacturer: Maxim Integrated Products

Specifications of MAX845ESA+

• Applications: Transformer Driver, PCMCIA
• Voltage - Input: 3.3V, 5V
• Number Of Outputs: 1
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Supply Current: 1.1 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Output Current: 200 mA
• Output Voltage: 12 V
• Supply Voltage: 5V
• Digital Ic Case Style: SOIC
• No. Of Pins: 8
• No. Of Regulated Outputs: 2
• Operating Temperature Range: -40°C To +85°C
• Device Type: Transformer
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Isolated Transformer Driver
for PCMCIA Applications
( Typical Operating Circuit , V
T
_____________________Pin Description
4
5V/div
A
____________________________Typical Operating Characteristics (continued)
PIN
1
2
3
4
5
6
7
8
= +25°C, unless otherwise noted.)
_______________________________________________________________________________________
NAME
GND1
GND2
N.C.
V
SD
D1
D2
FS
CC
SWITCHING WAVEFORMS
(TWO CYCLES)
Open Drain of N-Channel Transformer Drive 1
Ground. Connect both GND1 and GND2 to
ground.
Frequency Select (internal pull-up). If FS =
V
FS = 0V, switch frequency = 535kHz.
Shutdown. Ground for normal operation,
connect to V
No Connect. Not internally connected.
+5V Supply Voltage
Ground. Connect both GND1 and GND2 to
ground.
Open Drain of N-Channel Transformer Drive 2
CC
400ns/div
or open, switch frequency = 725kHz; if
IN
CC
= 5V, C1 = 0.1µF, C2 = C3 = 0.33µF, T1 = Halo TGM-010P3, CR1 = CR2 = MBR0520, FS = V
for shutdown.
FUNCTION
D1
D2
2V/div
TIME FROM SHUTDOWN TO POWER-UP
5 s/div
Figure 1. Test Circuit
V
5V
IN
FREQUENCY
ON / OFF
SELECT
500mV/div
SD
OUTPUT
C1
0.1µF
3
4
SD
FS
GND1
OF FIG. 1
CIRCUIT
MAX845
D2ON
D1OFF
2
SWITCHING WAVEFORM
(BREAK-BEFORE-MAKE)
V
CC
6
GND2
7
200ns/div
D1
D2
1
8
50
D2OFF
D1ON
R1
50
R2
CC
,