Unless otherwise specified: TA = 25°C, VIN = VO(NOM) + 1 V, COUT = 4.7 μF, CIN = 1 μF all voltage options, ON/
OFF pin tied to VIN.
Figure 5-1 Output Voltage versus Temperature (Legacy Chip)![LP2981-N Output Voltage versus Temperature (Legacy Chip) GUID-C59520EC-A35C-462A-93BC-3CB50AD79434-low.png](/ods/images/SNOS773O/GUID-C59520EC-A35C-462A-93BC-3CB50AD79434-low.png)
VIN = 4.0 V, VOUT = 3.0
V |
Figure 5-3 Output Voltage versus Temperature (Legacy Chip)
Figure 5-5 Output Voltage versus VIN (Legacy Chip)
Figure 5-7 Output Voltage versus VIN (Legacy Chip)
Figure 5-9 Output Voltage versus VIN and Temperature (New Chip)
Figure 5-11 Dropout Voltage (VDO) versus Temperature (Legacy Chip)
Figure 5-13 Dropout Voltage (VDO) versus Load Current (Legacy Chip)
Figure 5-15 Ground Pin Current (IGND) versus Temperature (Legacy
Chip)
Figure 5-17 Ground Pin Current (IGND) versus Load Current (Legacy
Chip)![LP2981-N Input
Current versus Input Voltage (VIN) (Legacy Chip) GUID-7B36134E-9063-4E0D-8B1D-4D4C9134436C-low.png](/ods/images/SNOS773O/GUID-7B36134E-9063-4E0D-8B1D-4D4C9134436C-low.png)
VOUT = 5 V, RL = ∞ and
RL = 5 kΩ |
Figure 5-19 Input
Current versus Input Voltage (VIN) (Legacy Chip)![LP2981-N Input
Current versus Input Voltage (VIN) (New Chip) GUID-20231203-SS0I-JRBB-2HZM-MVLZLZHJTN8G-low.svg](/ods/images/SNOS773O/GUID-20231203-SS0I-JRBB-2HZM-MVLZLZHJTN8G-low.svg)
VOUT = 3.3 V, RL = 3.3
kΩ |
Figure 5-21 Input
Current versus Input Voltage (VIN) (New Chip)![LP2981-N Line
Transient Response (New Chip) GUID-20231203-SS0I-SX1H-KLJ1-WKBNBDFXK7J9-low.svg](/ods/images/SNOS773O/GUID-20231203-SS0I-SX1H-KLJ1-WKBNBDFXK7J9-low.svg)
VOUT = 3.3 V, IL = 100
mA |
Figure 5-23 Line
Transient Response (New Chip)
Figure 5-25 Line
Transient Response (New Chip)![LP2981-N Load
Transient Response (Legacy Chip) GUID-0F830462-A607-4260-AD04-D30653FA4CA5-low.png](/ods/images/SNOS773O/GUID-0F830462-A607-4260-AD04-D30653FA4CA5-low.png)
VOUT = 3.0 V, COUT = 10
μF |
Figure 5-27 Load
Transient Response (Legacy Chip)![LP2981-N Load
Transient Response (Legacy Chip) GUID-D235BF97-9C35-4EAB-91D2-0C419B6457CB-low.png](/ods/images/SNOS773O/GUID-D235BF97-9C35-4EAB-91D2-0C419B6457CB-low.png)
VOUT = 5.0 V, COUT = 10
μF |
Figure 5-29 Load
Transient Response (Legacy Chip)
Figure 5-31 Short
Circuit Current versus Time (Legacy Chip)
Figure 5-33 Short
Circuit Current versus Time (Legacy Chip)
Figure 5-35 Instantaneous Short Circuit Current versus Temperature (Legacy
Chip)
Figure 5-37 Short
Circuit Current versus Output Voltage (VOUT) (Legacy
Chip)
Figure 5-39 Output Impedance versus Frequency (Legacy Chip)
Figure 5-41 Ripple Rejection versus Frequency (Legacy Chip)
Figure 5-43 Ripple Rejection versus Output Capacitor (CL) & Frequency
(New Chip)
Figure 5-45 Output Noise Density versus Load Current (IL) Frequency (New
Chip)
Figure 5-47 Input-to-Output Leakage versus Temperature (Legacy Chip)
Figure 5-49 Output Reverse Leakage versus Temperature (New Chip)![LP2981-N Turn-on Waveform (New Chip) GUID-20231125-SS0I-37DK-VDB0-LKN3QRVMTSLL-low.svg](/ods/images/SNOS773O/GUID-20231125-SS0I-37DK-VDB0-LKN3QRVMTSLL-low.svg)
VOUT = 3.3 V, RL = 3.3
kΩ |
Figure 5-51 Turn-on Waveform (New Chip)
Figure 5-53 Turn-off Waveform (New Chip)
Figure 5-55 ON/
OFF Pin Current versus VON/
OFF (New Chip)
Figure 5-57 ON/
OFF Threshold versus Temperature (Legacy
Chip)![LP2981-N Output Voltage versus Temperature (Legacy Chip) GUID-09EC1558-E753-4A80-A239-1950A85BBC0E-low.png](/ods/images/SNOS773O/GUID-09EC1558-E753-4A80-A239-1950A85BBC0E-low.png)
VIN = 4.3 V, VOUT = 3.3
V |
Figure 5-2 Output Voltage versus Temperature (Legacy Chip)![LP2981-N Output Voltage versus Temperature (New Chip) GUID-20231125-SS0I-G9GL-ZP2T-TX1H73GRP4RX-low.svg](/ods/images/SNOS773O/GUID-20231125-SS0I-G9GL-ZP2T-TX1H73GRP4RX-low.svg)
VIN = 4.3 V, VOUT = 3.3
V |
Figure 5-4 Output Voltage versus Temperature (New Chip)
Figure 5-6 Output Voltage versus VIN (Legacy Chip)
Figure 5-8 Output Voltage versus VIN (New Chip)
Figure 5-10 Line
Regulation versus VIN & Temperature (New Chip)
Figure 5-12 Dropout Voltage (VDO) versus Temperature (New Chip)
Figure 5-14 Dropout Voltage (VDO) versus Load Current (New Chip)
Figure 5-16 Ground Pin Current (IGND) versus Temperature (New Chip)
Figure 5-18 Ground Pin Current (IGND) versus Load Current (New Chip)![LP2981-N Input
Current versus Input Voltage (VIN) (Legacy Chip) GUID-ED9F4E2C-B4BE-45BF-BD1B-48978D8D97C5-low.png](/ods/images/SNOS773O/GUID-ED9F4E2C-B4BE-45BF-BD1B-48978D8D97C5-low.png)
VOUT = 5 V, RL = 500 Ω
and RL = 50 Ω |
Figure 5-20 Input
Current versus Input Voltage (VIN) (Legacy Chip)
Figure 5-22 Line
Transient Response (Legacy Chip)
Figure 5-24 Line
Transient Response (Legacy Chip)![LP2981-N Load
Transient Response (Legacy Chip) GUID-76A911BF-991A-4B99-ADEB-07AA778A2E9C-low.png](/ods/images/SNOS773O/GUID-76A911BF-991A-4B99-ADEB-07AA778A2E9C-low.png)
VOUT = 3.0 V, COUT =
3.3 μF |
Figure 5-26 Load
Transient Response (Legacy Chip)![LP2981-N Load
Transient Response (Legacy Chip) GUID-CF128C13-67C5-4B41-8BCA-8D2DD732618A-low.png](/ods/images/SNOS773O/GUID-CF128C13-67C5-4B41-8BCA-8D2DD732618A-low.png)
VOUT = 5.0 V, COUT =
3.3 μF |
Figure 5-28 Load
Transient Response (Legacy Chip)![LP2981-N Load
Transient Response (New Chip) GUID-20231125-SS0I-9RVB-XJLQ-43DK3B88T3LM-low.svg](/ods/images/SNOS773O/GUID-20231125-SS0I-9RVB-XJLQ-43DK3B88T3LM-low.svg)
VOUT = 3.3 V, COUT =
2.2 μF |
Figure 5-30 Load
Transient Response (New Chip)
Figure 5-32 Short
Circuit Current versus Time (New Chip)
Figure 5-34 Short
Circuit Current versus Time (New Chip)
Figure 5-36 Instantaneous Short Circuit Current versus Temperature (New Chip)
Figure 5-38 Short
Circuit Current versus Output Voltage (VOUT) (New Chip)
Figure 5-40 Output Impedance versus Frequency (Legacy Chip)
Figure 5-42 Ripple Rejection versus Load Current (IL) & Frequency (New
Chip)
Figure 5-44 Output Noise Density versus Frequency (Legacy Chip)
Figure 5-46 Output Noise Density versus Output Capacitor (CL) Frequency (New
Chip)
Figure 5-48 Output Reverse Leakage versus Temperature (Legacy Chip)
Figure 5-50 Turn-on Waveform (Legacy Chip)
Figure 5-52 Turn-off Waveform (Legacy Chip)
Figure 5-54 ON/
OFF Pin Current versus VON/
OFF (Legacy Chip)
Figure 5-56 ON/
OFF Pin Current versus VON/
OFF (New Chip)
Figure 5-58 ON/
OFF Threshold versus Temperature (New Chip)