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11 - 7

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HMC860LP3E

v00.0809

QUAD LOW NOISE HIGH PSRR

LINEAR VOLTAGE REGULATOR

Pin Number

Function

Description

Interface Schematic

1

Vdd

Unregulated power supply input

2GND

Supply Ground

3EN

Enable Input, TTL Logic Level. The VRx outputs are

floating (high impedance) when EN = Low.

4REF

Reference voltage (bandgap) output. Cannot be used to

source/sink current to/from external circuits

5HV3

Sets VR3 to 5V output when connected to

ground, otherwise no connection.

8HV4

Sets VR4 to 5V output when connected to

ground, otherwise no connection.

13

HV2

Sets VR2 to 5V output when connected to

ground, otherwise no connection.

16

HV1

Sets VR1 to 5V output when connected to

ground, otherwise no connection.

6RD3

Resistive feedback for VR3,

see “Output Voltage Adjust” section.

7RD4

Resistive feedback for VR4,

see “Output Voltage Adjust” section.

14

RD2

Resistive feedback for VR2,

see “Output Voltage Adjust” section.

15

RD1

Resistive feedback for VR1,

see “Output Voltage Adjust” section.

9

VR4

Regulator #4 Output

10

VR3

Regulator #3 Output

11

VR2

Regulator #2 Output

12

VR1

Regulator #1 Output

Pin Descriptions