Rev 1.0 – July 2005
EN5330
Pin Descriptions
PIN
NAME
FUNCTION
Output of the buffer leading to the error amplifier. Used for external modifications of
the compensation network.
1
COMP
External feedback voltage input. Option for programming the output voltage with a
2
3
XFB
resistor divider on VOUT
.
Remote voltage sense input. Connect this pin to the load voltage at the point to be
regulated.
VSENSE
4
5
6
7
EAIN
EAOUT
ENABLE
NC
Input of the error amplifier for external modifications of the compensation network.
Output of the error amplifier for external modifications of the compensation network.
Enable input. An input high enables operation. An input low disables operation.
NO CONNECT – Do not electrically connect this pin to PCB. See Note 5.
Over-Voltage set-point input. When using an external voltage divider and the XFB pin. When
VS0, VS1 and VS2 are left OPEN or pulled high, an additional voltage divider separate from
the XFB pin is required to set the OVP set-point. In this mode, the OVP function is disabled if
this voltage divider is not present.
8
XOV
9
10
11
PGND
Power ground for the power stage circuits.
12
13
14
15
16
VOUT
Voltage and power output.
17
18
19
20
21
22
23
24
25
26
VDRAIN
PGND
NC
Test point between the power FETs and Inductor.
Power ground for the power stage circuits.
NO CONNECT – Do not electrically connect this pin to PCB. See Note 5.
Power voltage input for the power stage circuits.
PVIN
27
28
29
30
31
VS2
ROCP
VS1
Voltage select line 2 input. See Table 1.
Over-Current trip point adjust input. Used for adjusting the OCP trip point.
Voltage select line 1 input. See Table 1.
32
33
34
AVIN
AGND
VS0
Analog voltage input for the controller circuits.
Analog ground for the controller circuits.
Voltage select line 0 input. See Table 1.
35
36
POK
SS
Power OK is an open drain transistor for power system state indication.
Soft-Start node. A capacitor is connected between this pin and AGND.
NOTES:
5. This pin is used for engineering test purposes and reserved for future use. Solder, but do not electrically connect this pin to
the PCB.
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