SFFSAO6 August   2025 TLV709

 

  1.   1
  2.   Trademarks
  3. 1Overview
  4. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 DBV (5-pin SOT-23) Package
    2. 2.2 PK (3-Pin SOT-89) Package
  5. 3Failure Mode Distribution (FMD)
  6. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 DBV (5-pin SOT-23) Package
    2. 4.2 PK (3-Pin SOT-89) Package
  7. 5Revision History

4.1 DBV (5-pin SOT-23) Package

Figure 4-1 and Figure 4-2 show the TLV709 pin diagrams for the DBV (5-pin SOT-23) package. For a detailed description of the device pins, see the Pin Configuration and Functions section in the TLV709 data sheet.

Figure 4-1 Pin Diagram (DBV (5-pin SOT-23), Fixed) Package
Figure 4-2 Pin Diagram (DBV (5-pin SOT-23), Adjustable ) Package
Table 4-2 Pin FMA for Device Pins Short-Circuited to Ground
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
IN 1 Power is not supplied to the device. System performance depends on upstream current limiting. B
GND 2 No effect. Normal operation. D
NC 3 No effect. Normal operation. D
FB 4 If FB is directly connected to OUT, regulation is not possible; the device operates at current limit. The device can cycle in and out of thermal shutdown. If FB is connected by a resistor divider, VOUT tracks VIN minus the dropout voltage.
For the fixed output option, this pin is NC. In that case, there is no effect of short circuiting the pin to GND and normal operation continues.		 B
NC D
OUT 5 Regulation is not possible, the device operates at current limit. The device can cycle in and out of thermal shutdown. B
Table 4-3 Pin FMA for Device Pins Open-Circuited
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
IN 1 Power is not supplied to the device. B
GND 2 Ground loop parasitics are increased and transient performance can be degraded. C
NC 3 No effect. Normal operation. D
FB 4 The error amplifier input is not connected. Output voltage is indeterminate. For the fixed output option, this pin is NC. In that case, there is no effect of open circuiting the pin and normal operation continues. B
NC D
OUT 5 The device output is disconnected from the load. B
Table 4-4 Pin FMA for Device Pins Short-Circuited to Adjacent Pin
Pin Name Pin No. Shorted to Description of Potential Failure Effects Failure Effect Class
IN 1 GND Power is not supplied to the device. System performance depends on upstream current limiting. B
GND 2 NC No effect. Normal operation. D
FB 3 OUT If FB is directly connected to OUT, the device operates in unity feedback and the output voltage is around 1.205V; assuming the input voltage is above 1.205V + maximum dropout at the load current. For the fixed output option, this pin is NC. In that case, there is no effect of connecting this pin to OUT and normal operation continues. B
NC D
Table 4-5 Pin FMA for Device Pins Short-Circuited to Supply
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
IN 1 No effect. Normal operation. D
GND 2 Power is not supplied to the device. System performance depends on upstream current limiting. B
NC 3 No effect. Normal operation. B
FB 4 The device channel is closed. If FB is tied to OUT, then VOUT = VIN. If FB is connected with a resistor divider, VOUT equals VIN if there is no loading on the device. If the loading on the device exceeds the leakage through the top feedback resistor, VOUT is pulled to 0V. For the fixed output option, this pin is NC. In that case, there is no effect of short circuiting the pin to supply and normal operation continues. B
NC D
OUT 5 Regulation is not possible. VOUT = VIN. B