SBOA530 November 2021 TLV9001
Design Goals
Input | Output | Supply | |||
---|---|---|---|---|---|
VI | Vo | Iout | Vcc | Veemax | Veemin |
–5.5 V < Vee < –4.5 V | –3 V | 600 mA | 0 V | –4.5 V | –5.5 V |
Design Description
This design accurately steps down a voltage level and holds it stable at a fixed output voltage (low dropout regulator). The regulator takes a –4.5-V to –5.5-V input voltage and steps it down to a –3-V rail that supplies current up to 600 mA.
Design Notes
Design Steps
The transfer function of the circuit is:
Selecting standard resistors, choose 1.02 kΩ and 715 Ω.
Design Results
DC Analysis Results
AC Analysis Results
Transient Analysis Results
Design References
See the Analog Engineer’s Circuit Cookbooks for TI’s comprehensive circuit library.
AN-1482 LDO Regulator Stability Using Ceramic Output Capacitors
Space-Grade, 100-krad, –2.5-V, Discrete Negative LDO Linear Regulator Circuit
For more information on many op amp topics including common-mode range, output swing, and bandwidth, please visit TI Precision Labs.
Design Featured Devices
TLV9001 | |
---|---|
Vss | 1.8 V–5.5 V |
VinCM | Rail-to-rail |
Vout | Rail-to-rail |
Vos | 0.4 mV |
Iq | 0.06 mA |
Ib | 5 pA |
UGBW | 1 MHz |
SR | 2 V/μs |
#Channels | 1 |
TLV9001 |
Design Alternative Devices
OPA392 | |
---|---|
Vss | 1.7V–5.5V |
VinCM | Rail-to-rail |
Vout | Rail-to-rail |
Vos | 1 μV |
Iq | 1.22 mA |
Ib | 0.01 pA |
UGBW | 13 MHz |
SR | 4.5 V/μs |
#Channels | 1 |
OPA392 |