SLUSBV0A May 2014 – JULY 2014 TPS40428
PRODUCTION DATA.
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
ADDR1 | 11 | I | High order address pin for PMBus device. Connect a resistor to AGND (see Table 3). |
ADDR0 | 12 | I | Low order address pin for PMBus device. Connect a resistor to AGND (see Table 3). |
AGND | 8 | — | Analog ground pin, used for analog signal. Connect to thermal pad directly. |
AVSCLK | 10 | I | AVS clock |
AVSDATA | 9 | I | AVS data |
BP3 | 26 | O | 3.3-V bias power for logic. A low-ESR ceramic capacitor with a value of 0.33 µF or greater should be connected closely from this pin or to AGND. The maximum suggested capacitor value is 10 µF. |
BP5 | 25 | O | Output bypass for the internal regulator. A low-ESR ceramic capacitor of 1 µF or greater should be connected closely from this pin to PGND pin. The maximum suggested capacitor value is 10 µF. |
CNTL1 | 3 | I | Logic level input which starts or stops channel 1. An internal 6-µA current source pulls VCNTL1 up to VBP5 when the pin is floating. |
CNTL2 | 4 | I | Logic level input which starts or stops channel 2. An internal 6-µA current source pulls VCNTL2 up to VBP5 when the pin is floating. |
COMP1 | 36 | O | Output of the error amplifier 1 and connection node for loop feedback components |
COMP2 | 15 | O | Output of the error amplifier 2 and connection node for loop feedback components |
CS1N | 33 | I | Negative pin of current sense amplifier for channel 1. An internal, 4-kΩ resistor pulls CS1N to 1.24 V during smart power mode operation to provide a bias voltage required by smart power stage. |
CS1P | 32 | I | Positive pin of current sense amplifier for channel 1 |
CS2N | 18 | I | Negative pin of current sense amplifier for channel 2. An internal, 4-kΩ resistor pulls CS2N to 1.24 V during smart power mode operation to provide a bias voltage required by smart power stage. |
CS2P | 19 | I | Positive pin of current sense amplifier for channel 2 |
DIFFO1 | 39 | O | Remote Sense Amplifier Output for channel 1 |
FB1 | 35 | I | Inverting input to the error amplifier 1. In normal operation, the voltage on this pin is equal to the internal reference voltage. Connect the FB1 pin to the BP5 pin to set the channel as slave channel. |
FB2 | 16 | I | Inverting input to the error amplifier 2. In normal operation, the voltage on this pin is equal to the internal reference voltage. Connect the FB2 pin to the BP5 pin to set the channel as slave channel. |
FLT1 | 34 | I/O | Fault signal of channel 1. An internal 100-kΩ resistor pulls FLT1 to BP3. |
FLT2 | 17 | I/O | Fault signal of channel 2. An internal 100-kΩ resistor pulls FLT2 to BP3. |
GSNS1 | 38 | I | Negative pin of Voltage Sense Signal for channel 1 |
GSNS2 | 13 | I | Negative pin of Voltage Sense Signal for channel 2 |
ISH1 | 30 | I | Current sharing signal of channel 1 for multi-phase mode |
ISH2 | 21 | I | Current sharing signal of channel 2 for multi-phase mode |
PG1 | 29 | O | Open drain power good indicator for channel 1 output voltage. This pin is pulled to ground internally in slave channel. |
PG2 | 22 | O | Open drain power good indicator for channel 2 output voltage. This pin is pulled to ground internally in slave channel. |
PGND | 27 | — | Power GND, used for BP5 bypass capacitor. Connect to thermal pad directly. |
PHSET | 2 | I/O | Phase set for multiphase mode |
PMBCLK | 7 | I | PMBus clock pin |
PMBDATA | 6 | I/O | PMBus data pin |
PWM1 | 28 | O | PWM signal for channel 1 |
PWM2 | 23 | O | PWM signal for channel 2 |
RT | 40 | I | Connecting a resistor from this pin to AGND sets the oscillator frequency |
SMBALERT | 5 | O | PMBus alert pin. |
SYNC | 1 | I/O | This is the synchronization pin for use with the external clock. The frequency of external SYNC signal must be 4 times of desired switching frequency during 1-, 2-, or 4- phases, and must be 3 times the desired switching frequency during 3-phase configuration. |
TSNS1 | 31 | I | External temperature sense signal input for channel 1 |
TSNS2 | 20 | I | External temperature sense signal input for channel 2 |
VDD | 24 | I | Power input to the controller. A low-ESR ceramic capacitor with a value of 1-μF or greater should be connected closely from this pin to AGND. |
VSNS1 | 37 | I | Positive pin of voltage sense signal for channel 1 |
VSNS2 | 14 | I | Positive pin of voltage sense signal for channel 2 |