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TPS7A02: TPS7A0525DQN Interested in the non-P version

Wouter Reeskamp
Prodigy 10 points
Part Number: TPS7A02
Other Parts Discussed in Thread: TPS706, , TLV707

Dear Tech support,

We have an application where we regulate the voltage from a rectifier circuit (NFC) to a large 11 mF 2.5V 'Super'-Capacitor meant to power a bluetooth IC for 30 minutes. Standby current is 400 uA so it should be possible but the capacitor discharges very fast with the TPS7A0525PDQNT. 

When the LDO is disabled, so when not charging, it will actively discharge its output capacitors, and therefore also discharge the Seiko cap too fast. Soldering a diode in series has been tried, but with no success a
- The maximum input voltage of the LDO is 5.5V. This is reached quickly when charged on a PNEV7462C devkit as well as a custom charging device. A wider input voltage range would be very much appreciated, or a strongly dampened charging field.

Questions:

1 There is mention of a non-P version that doesn't have the internal discharge, but we can not find it can you help?

2 Are there LDOs in small packages which have a wider input range? With NFC sometimes 6.5 V is on the input. 

Many thanks.

Sophisti Connected Product Design

  • 0
    TI__Expert 6799 points

    Hello Wouter, 

    My apologies that you have been having issues

    1) All versions that do not have 'P' in the OPN are the non-P versions. For example TPS7A0222DQNR is the Non- P version and the TPS7A0222PDQNR is the P version. The non-P version is only available in certain voltage options. 

    2) For something that is still relatively low Iq and up to 6.5 V I would recommend the TPS706 in a 2x2 package option. 

      TPS7A02 TPS706
    AEC Q100 NO NO
    Output Options Fixed Output Fixed Output
    Iout (Max) (A) 0.2 0.15
    Vin (Max) (V) 6 6.5
    Vin (Min) (V) 1.5 2.7
    Vout (Max) (V) 5 3.3
    Vout (Min) (V) 0.8 1.2
    Fixed Output Options (V) 1, 1.2, 1.5, 1.75, 1.8, 1.85, 2, 2.2, 2.3, 2.5, 2.8, 3, 3.1, 3.3, 3.6 1.2, 1.5, 1.8, 2.5, 2.8, 3, 3.3
    Enable YES YES
    Power Good NO NO
    Output Capacitor Type Ceramic Ceramic
    PSRR @ 100KHz (dB) 35 30
    Noise (uVrms) 130 190
    Accuracy (%) 1.5 2
    Vdo (Typ) (mV) 205 245
    Iq (Typ) (mA) 0.000025 0.001
    Thermal Resistance θJA (°C/W) 179.1 73
    Min Package Area (mm2) 0.49 4
    Package Type DSBGA, SOT-23, X2SON SOT-23, WSON

    Let me know if you have any further questions. 

    Thanks, 

    McKyla

  • +1 in reply to McKyla Beuttler
    Prodigy 10 points

    Dear McKyla,

    Thank you for your response. We are not seeing any non-P versions of the TPS7A02 regardless of the voltage type. Is that correct? 

    The TPS706 has non-P versions and indeed the higher max input V of 6.5 is better. It also has a higher Iq and a higher cut-off V, but it is mostly the larger WSON package which is an issue. 


    Is there any X2SON size regulator with no active discharge?

  • 0 in reply to Wouter Reeskamp
    TI__Expert 6799 points

    Hey Wouter, 

    For the TPS7A02, if you look at the orderables on the product page there will ones without the P in the orderable number. To make it easier the non-P is available in the following orderables. 

    TPS7A0218DBVR 

    TPS7A0222DQNR

    TPS7A0228DBVR

    TPS7A0228DQNR

    TPS7A0233DBVR

    TPS7A0233DQNR

    For the TPS706 it is only available in the non-P verison. I'm sure that you are aware of this, but incase not the easiest way to check for a given part is the functional block diagram and to look for a pull down circuitry. Some of our parts are not indicated with a P, but do have the active discharge function (pull down network). 

    The only part that is in X2SON with low IQ, is the TLV707 it is only up to 5.5V. 

      TLV707
    AEC Q100 NO
    Output Options Fixed Output
    Iout (Max) (A) 0.2
    Vin (Max) (V) 5.5
    Vin (Min) (V) 2
    Vout (Max) (V) 3.6
    Vout (Min) (V) 0.85
    Fixed Output Options (V) 0.85, 1, 1.15, 1.35, 1.7, 1.8, 1.85, 2.5, 2.6, 2.85, 2.9, 3, 3.1, 3.2, 3.3, 3.35, 3.4, 3.6
    Enable YES
    Power Good NO
    Output Capacitor Type Ceramic
    PSRR @ 100KHz (dB) 40
    Noise (uVrms) 45
    Accuracy (%) 1.5
    Vdo (Typ) (mV) 250
    Iq (Typ) (mA) 0.025
    Thermal Resistance θJA (°C/W) 208
    Min Package Area (mm2) 1
    Package Type X2SON

    Best, 

    McKyla