(+)

(-)

I =

1.216

R

R

I

EN

ADJ

GND

LM4121-ADJ

0.022PF

EN

2N3904

+

2.2PF

GND

ADJ

LM4121-ADJ

0.022PF

LM4121

www.ti.com

SNVS073C – APRIL 2000 – REVISED APRIL 2013

PRINTED CIRCUIT BOARD LAYOUT CONSIDERATION

The mechanical stress due to PC board mounting can cause the output voltage to shift from its initial value.

References in SOT packages are generally less prone to assembly stress than devices in Small Outline (SOIC)

package.

To reduce the stress-related output voltage shifts, mount the reference on the low flex areas of the PC board

such as near to the edge or the corner of the PC board.

Typical Application Circuits

Figure 35. Voltage Reference with Negative Output

Figure 36. 100mA Quasi-LDO Regulator

Figure 37. Boosted Output Current with

Figure 38. Voltage Reference with Complimentary

Output

Negative Voltage Reference

Figure 39. Two Terminal Constant Current Source

Figure 40. Precision Voltage Reference

with Force and Sense Output

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