MAX764CSA-T Maxim Integrated Products, MAX764CSA-T Datasheet - Page 7

• Manufacturer Part Number: MAX764CSA-T
• Description: DC/DC Switching Regulators 5/12/15/AdjV DC/DC Inverter
• Manufacturer: Maxim Integrated Products

(V+ = 5V, V
______________________________________________________________Pin Description
____________________________Typical Operating Characteristics (continued)
PIN
6, 7
1
2
3
4
5
8
0A
0V
CIRCUIT OF FIGURE 2, V+ = 5V, V
A: OUTPUT RIPPLE, 100mV/div
B: INDUCTOR CURRENT, 500mA/div
C: LX WAVEFORM, 10V/div
OUT
NAME
SHDN
GND
OUT
REF
FB
V+
LX
DISCONTINUOUS CONDUCTION AT
= -5V, T
_______________________________________________________________________________________
HALF CURRENT LIMIT
High-Efficiency, Low I
Sense Input for Fixed-Output Operation (V
Feedback Input. Connect FB to REF to use the internal voltage divider for a preset output. For adjustable-
output operation, use an external voltage divider, as described in the section Setting the Output Voltage.
Active-High Shutdown Input. With SHDN high, the part is in shutdown mode and the supply current is less
than 5µA. Connect to ground for normal operation.
1.5V Reference Output that can source 100µA for external loads. Bypass to ground with a 0.1µF capacitor.
Ground
Positive Power-Supply Input. Must be tied together. Place a 0.1µF input bypass capacitor as close to
the V+ and GND pins as possible.
Drain of the Internal P-Channel Power MOSFET. LX has a peak current limit of 0.75A.
A
= +25°C, unless otherwise noted.)
5 s/div
OUT
= -5V, I
LOAD
= 80mA
A
C
B
-5V/-12V/-15V or Adjustable,
FB
= V
FUNCTION
REF
). OUT must be connected to V
0V
0A
CIRCUIT OF FIGURE 2, V+ = 5V, V
A: OUTPUT RIPPLE, 100mV/div
B: INDUCTOR CURRENT, 500mA/div
C: LX WAVEFORM, 10V/div
Q
CONTINUOUS CONDUCTION AT
DC-DC Inverters
FULL CURRENT LIMIT
5 s/div
OUT
= -5V, I
OUT
LOAD
.
= 240mA
C
A
B
7