PT8124A

PT8120 TI1 | Alldatasheet

Document overview

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• PDF pages: 11

Technical content

Features

• Single Device: 30ADC
• +12V-Input
• High Efficiency: 92% @3.3V
• Programmable Output: (VRM Compatible 5-bit Codes)
• Multiphase Topology
• Output Remote Sense
• Over-Current Protection Cin =Required 1500µF electrolytic Cout =Required 660µF low ESR OS-Con®, or 1,200µF aluminum electrolytic Lin =Optional 1µH input choke

Ordering Information

PT8121/G72= 1.3V to 3.5V PT8122/G72= 1.075V to 1.85V PT8123/G72= 0.8V to 1.575V PT8124/G72= 1.05V to 1.825V PT8125/G72= 4.5V to 7.6V 30-A 12-V Input Programmable Integrated Switching Regulator SLTS158B (Revised 6/6/2002) PT8120 Series (Except PT8124) 4321 3 1 23–30 6 17–22 12–16 L O A D C OUT C IN PROGRAMMING PINS VIN VOUT GND REMOTE SENSE STBY* VID0 VID1 VID2 VID3 L in 1µH GND VID4 VID Common 11 The PT8120 family is designed to power high-end computing and signal processing applications, all of which demand high output currents at low supply voltages. The modules have a number of features to facilitate system integra- tion. These include over-current protection, thermal shutdown, an on/off standby control, and an output remote sense to compensate for voltage drop between the regulator and the load. In addition, the volt- age programming codes for the PT8121, PT8122, & PT8124 are compatible with Intel’s® VRM specifications.

• Thermal Shutdown
• Standby On/Off Control
• Space-Saving Package
• Solderable Copper Case PT Series Suffix (PT1234x) Case/Pin Order Package Configuration Suffix Code Vertical N (EKH) Horizontal A (EKF) SMD C (EKG) (Reference the applicable package code drawing for the dimensions and PC board layout)

For technical support and more information, see inside back cover or visit www.ti.com VID 3 VID 2 VID 1 VID 0 1111 1110 1101 1100 1011 1010 1001 1000 0111 0110 0101 0100 0011 0010 0001 0000 *For STBY pin: Open =Output Enabled Ground =Output Disabled Pin Function

1 VID 0

2 VID 1

3 VID 2

4 VID 3

5 VID 4

6 STBY *

7 Do Not Connect

8 Do Not Connect

9 Do Not Connect

10 Do Not Connect

11 VID Common

Notes: i) Logic 0 = Connect to VID Common ii) Logic 1 = Open circuit (no pull-up resistors) iii) VID3 and VID4 may not be changed while the unit is operating. iv) See page 4 for PT8124 (VRM 8.5) programming information. PT8120 Series Pin Function

12 V in

13 V in

14 V in

15 V in

16 V in

17 GND

18 GND

19 GND

20 GND

21 GND

22 GND

23 V out

24 V out

25 V out

26 V out

27 V out

28 V out

29 V out

30 V out

31 Remote Sense

Pin-Out Information (Except PT8124 †) 30-A 12-V Input Programmable Integrated Switching Regulator Output Voltage Programming Information (Except PT8124) PT8121 (VRM 8.3/8.4) VID 4=1 VID 4=0 Vout Vout 2.00V 1.30V 2.10V 1.35V 2.20V 1.40V 2.30V 1.45V 2.40V 1.50V 2.50V 1.55V 2.60V 1.60V 2.70V 1.65V 2.80V 1.70V 2.90V 1.75V 3.00V 1.80V 3.10V 1.85V 3.20V 1.90V 3.30V 1.95V 3.40V 2.00V 3.50V 2.05V PT8122 (VRM 9.0) VID 4=1 VID 4=0 Vout Vout 1.075V 1.475V 1.100V 1.500V 1.125V 1.525V 1.150V 1.550V 1.175V 1.575V 1.200V 1.600V 1.225V 1.625V 1.250V 1.650V 1.275V 1.675V 1.300V 1.700V 1.325V 1.725V 1.350V 1.750V 1.375V 1.775V 1.400V 1.800V 1.425V 1.825V 1.450V 1.850V PT8123 (Custom Code) VID 4=1 VID 4=0 Vout Vout 0.800V 1.200V 0.825V 1.225V 0.850V 1.250V 0.875V 1.275V 0.900V 1.300V 0.925V 1.325V 0.950V 1.350V 0.975V 1.375V 1.000V 1.400V 1.025V 1.425V 1.050V 1.450V 1.075V 1.475V 1.100V 1.500V 1.125V 1.525V 1.150V 1.550V 1.175V 1.575V PT8125 (Custom Code) VID 4=1 VID 4=0 Vout Vout 4.5V 6.1V 4.6V 6.2V 4.7V 6.3V 4.8V 6.4V 4.9V 6.5V 5.0V 6.6V 5.1V 6.7V 5.2V 6.8V 5.3V 6.9V 5.4V 7.0V 5.5V 7.1V 5.6V 7.2V 5.7V 7.3V 5.8V 7.4V 5.9V 7.5V 6.0V 7.6V † See page 4 for PT8124 pin-out

For technical support and more information, see inside back cover or visit www.ti.com PT8120 Series 30-A 12-V Input Programmable Integrated Switching Regulator PT8121 /2 /3 /5 Specifications (Unless otherwise stated T a =25°C, Cin =1,500µF, Cout =660µF, Vin =12V, & Io = Iomax ) PT8121 /2 /3 /5 Only Characteristics Symbols Conditions Min Typ Max Units Output Current I o Natural convection or V o ≤3.5V 0.1 (1) —3 0 A60°C with 200LFM airflow V o ≥4.5V 0.1 (1) —2 8 Input Voltage Range V in Over Io Range 10.8 — 13.2 V Set-Point Voltage Tolerance V o tol Over V o range — ±1 ±2 %V Line Regulation ∆Regline Over Vin range — ±10 — mV Load Regulation ∆Regload Over Io range — ±10 — mV Temperature Variation ∆Regtemp –40°C ≤Ta ≤85°C — ±0.5 — %V o Total Output Voltage Variation ∆Votot Includes set-point, line load, ——± 3% V–40°C ≤Ta ≤ 85°C Efficiency η Io =15A V o =5.0V — 94 — Vo =3.3V — 92 — Vo =1.5V — 84 — Vo =1.2V — 81 — Io =Iomax V o =5.0V — 93 — Vo =3.3V — 91 — Vo =1.5V — 82 — V o =1.2V — 78 — Vo Ripple (pk-pk) V r 20MHz bandwidth — 20 — mV Transient Response t tr 1A/µs load step, 50% to 100% Iomax — 50 — µSec ∆Vtr Vo over/undershoot — 100 — mV Over-Current Threshold I TRIP Reset followed by auto-recovery V o ≥4.5V — 40 — AVo ≤3.5V — 45 — Switching Frequency ƒ s Over load range 300 350 400 kHz Standby Control (pin 6) Referenced to GND (pins 17–22) Input High Voltage V IH — — Open (2) V Input Low Voltage V IL -0.2 — 0.8 Input Low Current I IL Pin 6 to GND — 0.5 — mA Standby Input Current I in standby Pin 6 to GND — 35 — mA External Output Capacitance C out See PT812x application schematic 660 (3) — 30,000 µF External Input Capacitance C in See PT812x application schematic 1,500 — — µF Operating Temperature Range T a Over Vin Range –40 (4) —+ 8 5 (5) °C Storage Temperature T s — -40 — +125 °C Mechanical Shock Per Mil-STD-883D, Method 2002.3 — 500 — G’s1 msec, Half Sine, mounted to a fixture Mechanical Vibration Mil-STD-883D, Method 2007.2 — 20 (6) — G’s20-2000 Hz, soldered in PCB Weight — Vertical/Horizontal — 55 — grams Flammability — Materials meet UL 94V-0 Notes: (1) ISR-will operate down to no load with reduced specifications. (2) The Standby input (pin 6) has an internal pull-up. If it is left open-circuit the PT812x will operate when input power is ap plied. A low-leakage MOSFET is recommended to control this input. The open-circuit voltage is nominally 5V. See application notes for interface cons iderations. (3) The PT8120 regulators require a minimum of 660µF, low ESR ouput capacitance (1,200µF for standard aluminum electrolytic) for proper operation. (4) For operation below 0°C, C out must have stable characteristics. Use either low ESR tantalum or Oscon® capacitors. (5) See safe Operating Area curves or consult factory for the appropriate derating. (6) The case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable p ackage outline drawing. Input Filter: An input filter inductor is optional for most applications. The inductor must be rated to handle the projected input current. A rating of 10 ADC for load applications, additional capacitance may be required. For more information consult the application note on capacitor selec tion.

For technical support and more information, see inside back cover or visit www.ti.com PT8120 Series 30-A 12-V Input Programmable Integrated Switching Regulator PT8124 Standard Application Cin =Required 1500µF electrolytic Cout =Required 660µF low ESR OS-Con®, or 1,200µF aluminum electrolytic Lin =Optional 1µH input choke PT8124 (Only) 4321 3 1 23–30 61 7 –22 12–16 L O A D C OUT C IN PROGRAMMING PINS VIN VOUT GND REMOTE SENSE STBY* VID 25mV VID 0 VID 1 VID 2 L in 1µH GND VID 3 VID Common 11 VID 3 VID 2 VID 1 VID 0 1111 1110 1101 1100 1011 1010 1001 1000 0111 0110 0101 0100 0011 0010 0001 0000 *For STBY pin: Open =Output Enabled Ground =Output Disabled Pin Function

1 VID 25mV

2 VID 0

3 VID 1

4 VID 2

5 VID 3

6 STBY

Notes: i) Logic 0 = Connect to VID Common ii) Logic 1 = Open circuit (no pull-up resistors) iii) VID2 and VID3 may not be changed while the unit is operating. Pin Function PT8124 Pin-Out Information (VRM 8.5) VID 25mV=0 VID 25mV=1 Vout Vout 1.300V 1.325V 1.350V 1.375V 1.400V 1.425V 1.450V 1.475V 1.500V 1.525V 1.550V 1.575V 1.600V 1.625V 1.650V 1.675V 1.700V 1.725V 1.750V 1.775V 1.800V 1.825V 1.050V 1.075V 1.100V 1.125V 1.150V 1.175V 1.200V 1.225V 1.250V 1.275V PT8124 Voltage Programming Information

For technical support and more information, see inside back cover or visit www.ti.com PT8120 Series 30-A 12-V Input Programmable Integrated Switching Regulator PT8124 Specifications (Unless otherwise stated T a =25°C, Cin =1,500µF, Cout =660µF, Vin =12V, & Io = Iomax ) PT8124 Only Characteristics Symbols Conditions Min Typ Max Units Output Current I o Natural convection or 0.1 (1) —3 0A60°C with 200LFM airflow Input Voltage Range V in Over Io Range 10.8 — 13.2 V Set-Point Voltage Tolerance V o tol Over V o range, Io =0.5A — ±1 ±2 %V Line Regulation ∆Regline Over Vin range — ±10 — mV Load Regulation (Droop) ∆Regload Over Io range — 2 — mV/A Temperature Variation ∆Regtemp –40°C ≤Ta ≤85°C, , Io =0.5A — ±0.5 — %V o Total Output Voltage Variation ∆Votot Includes set-point, line, load — — 85 (2) mV–40°C ≤Ta ≤ 85°C Efficiency η Io =15A V o =1.8V — 86 — Vo =1.5V — 84 — % Vo =1.2V — 81 — Io =Iomax V o =1.8V — 84 — Vo =1.5V — 82 — % V o =1.2V — 78 — Vo Ripple (pk-pk) V r 20MHz bandwidth — 20 — mV Transient Response t tr 1A/µs load step, 50% to 100% Iomax — 50 — µSec ∆Vtr Vo over/undershoot — 50 — mV Over-Current Threshold I TRIP Reset followed by auto-recovery — 47 — A Switching Frequency ƒ s Over load range 300 350 400 kHz Standby Control (pin 6) Referenced to GND (pins 17–22) Input High Voltage V IH — — Open (3) V Input Low Voltage V IL -0.2 — 0.8 Input Low Current I IL Pin 6 to GND — 0.5 — mA Standby Input Current I in standby Pin 6 to GND — 35 — mA External Output Capacitance C out See PT8124 application schematic 660 (4) — 30,000 µF External Input Capacitance C in See PT8124 application schematic 1,500 — — µF Operating Temperature Range T a Over Vin Range –40 (5) —+ 8 5 (6) °C Storage Temperature T s — -40 — +125 °C Mechanical Shock Per Mil-STD-883D, Method 2002.3 — 500 — G’s1 msec, Half Sine, mounted to a fixture Mechanical Vibration Mil-STD-883D, Method 2007.2 — 20 (7) — G’s20-2000 Hz, soldered in PCB Weight — Vertical/Horizontal — 55 — grams Flammability — Materials meet UL 94V-0 Notes: (1) ISR-will operate down to no load with reduced specifications. (2) Total output voltage variation includes load regulation droop, which is required for compliance with specification VRM 8.5-4 (3) The Standby input (pin 6) has an internal pull-up. If it is left open-circuit the PT812x will operate when input power is ap plied. A low-leakage MOSFET is recommended to control this input. The open-circuit voltage is nominally 5V. See application notes for interface cons iderations. (4) The PT8120 regulators require a minimum of 660µF, low ESR ouput capacitance (1,200µF for standard aluminum electrolytic) for proper operation. (5) For operation below 0°C, C out must have stable characteristics. Use either low ESR tantalum or Oscon® capacitors. (6) See safe Operating Area curves or consult factory for the appropriate derating. (7) The case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable p ackage outline drawing. Input Filter: An input filter inductor is optional for most applications. The inductor must be rated to handle the projected input current. A rating of 10 ADC for load applications, additional capacitance may be required. For more information consult the application note on capacitor selec tion.

For technical support and more information, see inside back cover or visit www.ti.com Characteristic Data; Vin =12V (See Note A) Safe Operating Area; Vin =12V (See Note B) Efficiency vs Output Current PT8120 Series, Vout =5V Power Dissipation vs Output Current PT8120 Series, Vout =1.5V Output Ripple vs Output Current PT8120 Series, Vout =3.3V 0 6 12 18 24 30 Iout (A ) Ambient Temperature (°C) 400LFM 200LFM 120LFM 60LFM Nat conv Airflow 0 6 12 18 24 30 Iout (A ) Ambient Temperature (°C) Nat conv 60LFM 120LFM 200LFM 400LFM Airflow 0 6 12 18 24 30 Iout (A ) Ambient Temperature (°C) 400LFM 200LFM 120LFM 60LFM Nat conv Airflow Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter. Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures 100 0 6 12 18 24 30 Iout (A ) Efficiency - % 3.3V 2.5V 1.8V 1.5V 1.2V 1.0V 0.8V VOUT 0 6 12 18 24 30 Iout (A ) Ripple - mV 0.8V 3.3V 1.5V VOUT 0 6 12 18 24 30 Iout (A ) Pd - Watts 3.3V 1.5V 0.8V VOUT PT8120 Series 30-A 12-V Input Programmable Integrated Switching Regulator

For technical support and more information, see inside back cover or visit www.ti.com PT8120 Series & PT8139 Capacitor Recommendations for the PT8120 Series of Programmable ISRs Input Capacitors The recommended input capacitor(s) is determined by

1.6 Arms minimum ripple current rating and 1,500µF

minimum capacitance. Ripple current and Equivalent Series Resistance (ESR) values are the major considerations along with temperature when selecting the proper capaci- tor. The tantalum capacitors listed below cannot be used on the input bus since they are not rated for 12V operation. Output Capacitors The minimum required output capacitance is 660µF (organic/polymer), or 1,200 (aluminum electrolytic) with a maximum ESR less than or equal to 50m Ω . Failure to observe this requirement may lead to regulator instabil- ity or oscillation. Electrolytic capacitors have poor ripple performance at frequencies greater than 400kHz, but excellent low frequency transient response. Above the ripple frequency ceramic decoupling capacitors are nec- essary to improve the transient response and reduce any microprocessor high frequency noise components apparent during higher current excursions. Preferred low ESR type capacitor part numbers are identified in the Table 1 below. /rodneVroticapaC seireS scitsiretcarahCroticapaCy titnauQ gnikroW egatloV )Fµ(eulaVt nelaviuqE)RSE( ecnatsiseRseireS mumixaMC°501 elppiR )smrI(tnerruC lacisyhP )mm(eziS tupnI suB tuptuO suB rebmuNtraProdneV cinosanaP )laidaR(CF )tnuoMecafruS(KF/CF V53 V52 V61 V52 V61 0051 0051 0074 0022 0022 820.0 Ω 920.0 Ω 330.0 Ω 820.0 Ω 830.0 Ω Am0942 Am5022 Am0602 Am0942 Am0002 81 × 02 61 × 02 81 × 5.61 81 × 5.12 81 × 5.61 S251V1CFUEE S251E1CFUEE M274C1KFVEE N222E1CFVEE N222C1CFVEE noc-imehCdetinU seireSZXL V53 V52 V61 0081 0081 0072 820.0 Ω 920.0 Ω 920.0 Ω Am0942 Am0122 Am0122 81 × 02 61 × 02 61 × 02 LL02X81M281BV53ZXL LL02X61M281BV52ZXL LL02X61M272BV61ZXL nocihciN seireSWP seireSMP V52 V52 V52 0001 0081 0051 830.0 ÷2Ω 920.0 Ω 430.0 Ω Am0023 Am5022 Am0771 02x5.21 02x61 61 × 02 HHM201E1WPU 6HHM281E1WPU 6HHM251E1MPU )cinagrO(:noc-sO SS )tnuoMecafruS(VS V01 V01 033 033 520.0 Ω 020.0 Ω Am0053 Am0083 01 × 5.01 3.01 × 3.01 )1(R/N )1(R/N V(M033SS01 o )V6< V(033VS01 o )V6< mulatnaTXVA )tnuoMecafruS(SPT V01 V01 033 033 1.0 ÷Ω 50.0=2 Ω 60.0 ÷Ω 30.0=2 Ω Am0052> Am0003> L3.7 × W7.5 × H1.4 )1(R/N )1(R/N V(0010R010M733ESPT o )V5< V(0600R010M733VSPT o )V5< temeK mulatnaT/remyloP seireS025T (t nuoMecafruS) V01 V01 033 033 040.0 ÷2Ω 040.0 ÷2Ω Am0081 Am0081> W3.4 × L3.7 × H0.4 )1(R/N )1(R/N V(SA010M733X025T o )V6< V(SA600M033D025T o )V4< mulatnaTeugarpS seireSD495 (t nuoMecafruS) V010 335 40.0 ÷2Ω Am0632L 2.7 × W6 × H1.4 )1(R/N2 V (T2R0100X733D495 o )V5< Note: (N/R -Not recommended) The 10V-rated tantalum capacitors cannot be used on the input bus. Table 1 Capacitors Characteristic Data Tantalum Characteristics Tantalum capacitors are recommended on the output bus but only AVX TPS Series, Sprague 593D/594/595 Series, or Kemet T495/T510,520 Series. These capacitors are recommended over other types due to their higher surge current, excellent power dissipation and ripple current ratings. As a caution, the TAJ Series by AVX is not rec- ommended. This series exhibits considerably higher ESR, reduced power dissipation and lower ripple current capa- bility. The TAJ Series is also less reliable compared to the TPS series when determining power dissipation capability. Capacitor Table Table 1 identifies the characteristics of capacitors from a number of vendors with acceptable ESR and ripple current (rms) ratings. The suggested minimum quantities per regulator for both the input and output buses are identified. This is not an extensive capacitor list. Capacitors from other vendors are available with comparable specifications. Those listed are for guidance. The RMS ripple current rating and ESR (Equivalent Series Resistance at 100kHz) are the critical parameters are necessary to insure both optimum regulator performance and long capacitor life.

For technical support and more information, see inside back cover or visit www.ti.com Application Notes Using the On/Off Standby Function of the PT8120 Series of Programmable ISRs The PT8120 series of programmable ISRs incorporates an On/Off Standby function. This feature may be used to turn the regulated output of the module off while input voltage is applied. This places the module in “standby” mode. The standby control may be used for power-up sequencing, or wherever there is a requirement to control the module’s output status from another circuit. The Standby function is provided by the STBY* control, pin 6. If pin 6 is left open-circuit the regulator operates normally, providing a regulated output when a valid sup- ply voltage is applied to V in (pins 10-16) with respect to GND (pins 17-22). Connecting pin 6 to ground 1 places the regulator in standby mode 2, and reduces the input current to typically 35mA. Applying a ground signal to pin 6 prior to power-up, will inhibit the output during the period that input power is applied. When the ground signal to pin 6 is removed, the regulator initiates a soft- start to re-establish the set output voltage.

3 To ensure

that the regulator output is properly enabled, the STBY* control pin must be open circuit. Table 1 Standby Control Requirements 2 Parameter Min Typ Max VIH — Open Cct. 1 VIL –0.2V — 0.8V ISTBY –0.5mA Notes: 1. The standby on a PT8120 series regulators must be controlled with an open-collector (or open-drain) transistor (See fig. 1). Do Not use a pull-up resistor. Table 1 gives the STBY* pin parameters. The control pin has an open-circuit voltage of 5Vdc. To shut the regulator output off, the control pin must be “pulled” to less than 0.8Vdc with a low-impedance sink to ground. Figure 1 Figure 2 PT8120 Series & PT8139 2. In the standby mode the output of the regulator is tri- state, and the output voltage falls at the rate that the load circuit discharges the output filter capacitors. 3. When the ground signal to the Standby pin is removed, the regulator output initiates a soft-start cycle by first asserting a low impedance to ground. If an external voltage is applied to the output bus, it will sink current and possibly over-stress the part. Turn-On Time Turning Q 1 in Figure 1 off, removes the low-voltage signal at pin 6. After approximately 5-ms the regulator output rises and reaches full regulation within 40ms. Fig. 2 shows the typical waveforms of a PT8121 following the prompt turn-off of Q 1. The turn-off of Q1 corresponds to the rise in Vstby. The output voltage was set to 3.3V, and the waveforms were measured with a 12V input source, and 18A resistive load. L O A D C OUT C IN VIN VO =3.3V GND VO SENSE 1 =Off Lin 1µH GND PT8121 4321 3 1 23–30 61 7 –22 12–16 511 VID4 – VID0 Sense V IN VOUT STBY GND VID Common BSS138 Vo (1V/Div) Iin (5A/Div) Vstby (5V/Div) HORIZ SCALE: 5ms/Div

For technical support and more information, see inside back cover or visit www.ti.com Pin-Coded Output Voltage Programming of the 30-A Rated PT8120 Series Regulators The PT8120 series of Excalibur® ISRs incorporate a pin-coded output voltage control. These regulators must be programmed to a specific output voltage from a pre- set range defined by the regulator model. Programming is achieved by selectively connecting the control inputs, “VID0–VID4” (pins 1–5), to the “VID Common” (pin 11). The programming code and voltage range for each model is defined in the data sheet. Refer to the PT8120 Series data sheet for more information. The program codes for the PT8121, PT8122, and PT8124 models are also com- patible with some of the “Voltage ID” codes defined by Intel’s® VRM specifications. Figure 1 shows the pin-strap connections for selecting the desired output voltage from the program code range. Notes: 1. The programming convention is as follows:- Logic 0: Connect to pin 11 (VID Common). Logic 1: Open circuit/open drain (See notes 2, & 4) 2. Do not connect pull-up resistors to the voltage programming pins. 3. To minimize output voltage error, use pin 11 (VID Common) as the logic “0” reference. If the regulator is used to power a VRM compatible microprocessor this may not be practical. In this case connect pin 11 to pins 17–22, or the ground plane close to the regulator. Figure 1 4. If active devices are used to ground the voltage control pins, low-level open drain MOSFETs should be used over bipolar transistors. The inherent V ce(sat) in bipolar devices introduces errors in the device’s internal voltage control circuit. Discrete transistors such as the BSS138, 2N7002, IRLML2402, are examples of appropriate devices. Active Voltage Programming: Special precautions should be taken when making changes to the voltage control progam code while the output is active. It is recommended that the ISR be powered down or held placed in standby. Changes made to the program code while V out is active induces high current transients through the device. This is the result of the electrolytic output capacitors being either charged or discharged to the new output voltage set-point. The transient current can be minimized by making only incremental c hanges to the binary code, i.e. one LSB at a time. A minimum of 100µs settling time between each program state is also recom- mended. Making non-incremental changes to VID3 and VID4 with the output enabled is discouraged. The tran- sients induced may activate the module’s over-current protection. If the program code cannot be asserted prior to power-up, pull pin 6, STBY*, to GND during the period that the input voltage is applied. The release of pin 6 will then to allow the device to initiate a soft-start power-up to the program voltage. L O A DC OUT C IN VIN VO =2.5V GND VO SENSE Lin 1µH GND VID0 VID1 VID2 VID3 VID4 PT8121 4321 3 1 23–30 61 7 –22 12–16 511 VID4 – VID0 Sense VIN VOUT STBY GND VID Common PT8120 Series & PT8139

www.ti.com 1-Sep-2012 Addendum-Page 1 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp (3) Samples (Requires Login) PT8121A OBSOLETE SIP MODULE EKF 31 TBD Call TI Call TI PT8122A NRND SIP MODULE EKF 31 6 TBD Call TI Level-1-215C-UNLIM PT8125C NRND SIP MODULE EKG 31 6 TBD Call TI Level-3-215C-168HRS (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

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