PT6930

PT6930 TI | Alldatasheet

Document overview

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Technical content

Features

• Dual Outputs: +3.3V/2.5V +3.3V/1.5V +3.3V/1.8V
• Adjustable Output Voltages
• Remote Sense (both outputs)
• Standby Function
• Over-Temperature Protection
• Soft-Start
• Internal Sequencing
• 23-pin Excalibur™ Package Pin Function 1V o 1 Sense

2 No Connect

3 STBY

7 GND

8 GND

9 GND

10 GND

11 GND

12 Vo 1

13 Vo 1

14 Vo 1

15 Vo 1

16 Vo 1 Adjust

17 No Connect

18 Vo 2

19 Vo 2

20 Vo 2

21 Vo 2

22 Vo 2 Sense

23 Vo 2 Adjust*

Description

The PT6930 Excalibur™ series of 8-A dual-output ISRs are designed to power DSP ICs. Both output voltages are inde- pendently adjustable with external resistors. The second output may also be set to an alternate lower bus voltage with a simple pin strap. Internal power sequencing of both outputs, during both power-up and power-down, meets the requirements of most DSP chipsets. PT6930 C 2 GND V IN GND 4,5,6 7-11 12-15 18-21 C 1 C 3 STBY Vo2 Sense Vo1 Sense Vo 1 Vo 2 PT Series Suffix (PT1234X) Case/Pin Configuration Vertical Through-Hole N Horizontal Through-Hole A Horizontal Surface Mount C (For dimensions and PC board layout, see Package Styles 1320 and 1330). SLTS062B (Revised 7/20/2001) * Note:Vo1 & Vo2 Adjust can be pin-strapped to an alternative lower bus voltage. Consult the voltage adjustment application note for more information. Specifications Characteristics PT6930 SERIES (Ta= 25°C unless noted) Symbols Conditions Min Typ Max Units Output Current Io 1, Io2 Ta = +60°C, 200 LFM, pkg N Vo 1 =3.3V 0.1 (1) —5 . 5 (2) Ta = +25°C, natural convection Vo 1 =3.3V 0.1 (1) —6 . 0 (2) Input Voltage Range V in 0.1A ≤ Io ≤ Ityp 4.5 — 5.5 V Output Voltage Tolerance ∆ Vo Vin = +5V, Io =Ityp, both outputs Vo-0.1 — V o+0.1 V0°C ≤ Ta ≤ +65°C Line Regulation Reg line 4.5V ≤ Vin ≤ 5.5V, Io =Ityp Vo1 — ±7 ±17 VVo2 — ±7 ±13 Load Regulation Reg load Vin = +5V, 0.1 ≤ Io ≤ Ityp Vo1 — ±17 ±33 mV Vo2 — ±4 ±10 Vo Ripple/Noise V n Vin = +5V, Io =Ityp Vo1 —5 0— mV Vo2 —2 5— Transient Response t tr Io step between 0.5xItyp and Ityp — 25 — µSec with C2 = 330µF V os Vo over/undershoot Vo 1 —6 0— mVVo2 —6 0— Efficiency η Vin = +5V, Io =4A total — 75 — % Switching Frequency ƒ o 4.5V ≤ Vin ≤5.5V 475 600 725 kHz0.1A ≤ Io ≤ Ityp (Continued)

For technical support and more information, see inside back cover or visit www.ti.com Note A:Note A:Note A:Note A:Note A: All characteristic data in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the ISR. Note B:Note B:Note B:Note B:Note B: SOA curves represent operating conditions at which internal components are at or below the manufactuer’s maximum rated operating temperatures. PT6930 Series Performance (See Note A) Total Efficiency vs Io 1; Io2 =Io2(max) Total Power Dissipation vs Io 1; Io2 =Io2(max) PT6931 (Io 2 fixed at 2.2A) Vo1 Ripple vs Io 1; Io2 =Io2(max) PT6930 Series 8-A 5V-Input Dual-Output Integrated Switching Regulator Specifications (From previous page) Characteristics PT6930 SERIES (Ta= 25°C unless noted) Symbols Conditions Min Typ Max Units Absolute Maximum T a — -40 (3) — +85 (4) °COperating Temperature Range Storage Temperature T s — -40 — +125 °C Weight — Vertical/Horizontal — 29 — grams Notes: (1) Iomin current of 0.1A can be divided btween both outputs; Vo1, or Vo2. The ISR will operate down to no-load with reduced specifications. (2) Iomax listed for each output assumes the maximum current drawn simultaneously on both outputs. Consult the factory for the absolu te maximum. (3) For operating temperatures below 0°C, use tantalum type capacitors at both the input and output. (4) See Safe Operating Area curves for appropriate derating. Input/Output Capacitors: The PT6930 series requires a minimumm capacitance of 330µF at both the input and Vo1 output for proper operation in all applications. In addition, the input capacitor, C1, must be rated for a minimum of 1.0Arms ripple current. For transient or dynamic dynamic loads, additional capacitance may be required. Safe Operating Area @VIN =5V (See Note B) TYPICAL CHARACTERISTICS 0123456 Io1(A) [ Io2 fixed at Io2(max) ] Ripple - mV PT6931 PT6932 PT6933 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 Io1 (A) [ Io2 fixed at 2.2A ] Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv VOUT 0123456 Io1 (A) [ Io2 fixed at Io2(max) ] Efficiency - % PT6931 PT6932 PT6933 0123456 Io1 (A) [ Io2 fixed at Io2(max) ] Pd - Watts PT6931 PT6932 PT6933

For technical support and more information, see inside back cover or visit www.ti.com PT6920/PT6930 Series Adjusting the Output Voltage of the PT6920 and PT6930 Dual Output Voltage ISRs Each output voltage from the PT6920 and PT6930 series of ISRs can be independantly adjusted higher or lower than the factory trimmed pre-set voltage. Vo 1 or Vo2 may each be adjusted either up or down using a single external resis- tor 2. Table 1 gives the adjustment range for both Vo1 and Vo2 for each model in the series as Va(min) and Va(max). Note that Vo2 must always be lower than Vo1 3. Vo1 Adjust Up: To increase the output, add a resistor R4 between pin 16 (V1 Adjust) and pins 7-11 (GND) 2. Vo1 Adjust Down:Add a resistor (R3), between pin 16 (Vo1 Adjust) and pin 1 (Vo1 Sense) 2. Vo2 Adjust Up: Add a resistor R2 between pin 23 (Vo2 Adjust) and pins 7-11 (GND) 2. Vo2 Adjust Down:Add a resistor (R1) between pin 23 (Vo2 Adjust) and pin 22 (Vo2 Sense) 2. Refer to Figure 1 and Table 2 for both the placement and value of the required resistor. Notes: 1. The output voltages, Vo1 and Vo2, may be adjusted independantly. 2. Use only a single 1% resistor in either the (R3) or R4 location to adjust Vo1, and in the (R1) or R2 location to adjust Vo2. Place the resistor as close to the ISR as possible. 3. Vo2 must always be at least 0.2V lower than Vo1. 4. Vo2 on both the PT6921 and PT6931 models may be adjusted from 2.5V to 1.8V by simply connecting pin 22 (Vo 2 Sense) to pin 23 (Vo2 Adjust). For more details, consult the data sheet. Table 1 PT6920 ADJUSTMENT RANGE AND FORMULA PARAMETERS Output Bus Vo 1 Vo2 Series Pt # Standard Case PT6921/22 PT6921 PT6922 Excalibur Case PT6931/32 PT6931 PT6932 PT6933 Adj. Resistor (R3)/R4 (R1)/R2 (R1)/R2 (R1)/R2 Vo(nom) 3.3V 2.5V 1.5V 1.8V Va(min) 2.3V 1.8V 1.2V 1.2V Va(max) 3.6V 3.0V 3.0V 3.0V Vr 1.02V 1.0V 1.0V 1.0V Ro (kΩΩΩΩΩ ) 12.1 10.0 9.76 10.0 Rs (kΩΩΩΩΩ ) 12.1 11.5 6.49 3.32 Figure 1 C 1 C 2 C 3 (R3) (R1) L O A D L O A D Adj Down Adjust Up Vin COM CO V2 o V1 o PT6920 18 - 21 237 - 11 4,5,6 Vin V2 out GND Vo 2(adj) V 1(sns) Vo 1(adj) 12 - 15V1 out V 2(sns) STBY Adjust V1out Adjust V2out 5. If Vo1 is increased above 3.3V, the minimum input voltage to the ISR must also be increased. The minimum required input voltage must be (Vo 1 + 1.2)V or 4.5V, whichever is greater. Do not exceed 5.5V 6. Never connect capacitors to either the Vo1 Adjust or Vo2 Adjust pins. Any capacitance added to these control pins will affect the stability of the respective regulated output. 7. Adjusting either voltage (Vo1 or Vo2) may increase the power dissipation in the regulator, and correspondingly change the maximum current available at either output. Consult the factory for application assistance. The adjust up and adjust down resistor values can also be calculated using the following formulas. Be sure to select the correct formula parameter from Table 1 for the output and model being adjusted. (R1) or (R3) = Ro (Va – Vr) – Rs kΩ Vo – Va R2 or R4 = Vr . Ro – Rs kΩ Va – Vo Where: V o = Original output voltage, (Vo1 or Vo2) Va = Adjusted output voltage Vr = The reference voltage from Table 1 Ro = The resistance value from Table 1 Rs = The series resistance from Table 1

For technical support and more information, see inside back cover or visit www.ti.com Application Notes continued 1.5 (13.3)kΩ 1.55 189.0k Ω (18.7)kΩ 1.6 91.1k Ω (26.7)kΩ 1.65 58.6k Ω (40.0)kΩ 1.7 42.3k Ω (66.7)kΩ 1.75 32.6k Ω (147.0)kΩ 1.8 (0.0)kΩ 26.0kΩ 1.85 (1.6)kΩ 21.4kΩ 197.0kΩ 1.9 (3.5)kΩ 17.9kΩ 96.7kΩ 1.95 (5.8)kΩ 15.2kΩ 63.3kΩ 2.0 (8.5)kΩ 13.0kΩ 46.7kΩ 2.05 (11.8)kΩ 11.3kΩ 36.7kΩ 2.1 (16.0)kΩ 9.8kΩ 30.0kΩ 2.15 (21.4)kΩ 8.5kΩ 25.3kΩ 2.2 (28.5)kΩ 7.5kΩ 21.7kΩ 2.25 (38.5)kΩ 6.5kΩ 18.9kΩ 2.5 (10.3)kΩ 3.3kΩ 11.0kΩ 3.05 (86.2)kΩ 3.1 (114.0)kΩ 3.15 (160.0)kΩ 3.2 (252.0)kΩ 3.25 (528.0)kΩ 3.3 3.4 111.0k Ω See Note 5 3.5 49.6k Ω 3.6 29.0k Ω R1/R3 = (Blue) R2/R4 = Black Table 2 PT6920/PT6930 ADJUSTMENT RESISTOR VALUES Output Bus Vo 1 Vo2 Series Pt# Standard Case PT6921/6922 PT6921 PT6922 Excalibur Case PT6931/6932 PT6931 PT6932 PT6933 Adj Resistor (R3)/R4 (R1)/R2 (R1)/R2 (R1)/R2 Vo(nom) 3.3Vdc 2.5Vdc 1.5Vdc 1.8Vdc Va(req’d) PT6920/PT6930 Series

For technical support and more information, see inside back cover or visit www.ti.com Application Notes continued Table 1: Input/Output Capacitors (a) -Not recommended. The maximum ripple current rating of these capacitors does not meet the operating limits. (N/R) -Oscon Type Capcitors are not recommended for this application due to extremely low equivatlent series resistance (ESR) Capacitor Recommendations for the Dual-Output PT6920/30 Regulator Series Input Capacitors: The recommended input capacitance is determined by 1.0 ampere minimum ripple current rating and 330µF minimum capacitance (300µF for Oscon® or low ESR tantalum). Ripple current and <100mΩ equivalent series resistance (ESR) values are the major considerations, along with tem- perature, when designing with different types of capacitors. Tantalum capacitors have a recommended minimum voltage rating of 2 × the maximum DC voltage + AC ripple. This is necessary to insure reliability for input voltage bus applica- tions. Output Capacitors: C 2(Required), C3(Optional) The ESR of the required capacitor (C2) must not be greater than 150mΩ . Electrolytic capacitors have poor ripple per- formance at frequencies greater than 400kHz but excellent low frequency transient response. Above the ripple fre- quency, ceramic capacitors are necessary to improve the transient response and reduce any high frequency noise components apparent during higher current excursions. Preferred low ESR type capacitor part numbers are identified in Table 1. The optional 100µF capacitor (C 3) for Vo2 can have an ESR of up to 200mΩ for optimum performance and ripple reduction. (Note: Vendor part numbers for the optional capacitor, C3, are not identified in the table. Use the same series selected for C2) PT6920/PT6930 Series Tantalum Capacitors Tantalum type capacitors can be used for the output but only the AVX TPS series, Sprague 593D/594/595 series or Kemet T495/T510 series. The AVX TPS series, Kemet or Sprague series tantalums are recommended over many other types due to their higher rated surge, power dissipation, and ripple current capability. As a caution the TAJ series by AVX is not recommended. This series has considerably higher ESR, reduced power dissipation and lower ripple current capability. The TAJ Series is a less reliable when compared to the AVX TPS series when determining power dissipation capability. Tantalum types are recommended for applications where ambient temperatures fall below 0°C. Capacitor Table Table 1 identifies the characteristics of capacitors from a number of vendors with acceptable ESR and ripple current (rms) ratings. The number of capacitors required at both the input and output buses is identified for each capacitor type. 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 critical parameters necessary to insure both optimum regulator performance and long capacitor life. roticapaCr oticapaC roticapaC roticapaCr oticapaC /rodneV/ rodneV /rodneV /rodneV/ rodneV tnenopmoCt nenopmoC tnenopmoC tnenopmoCt nenopmoC seireSs eireS seireS seireSs eireS scitsiretcarahCroticapaCs citsiretcarahCroticapaC scitsiretcarahCroticapaC scitsiretcarahCroticapaCs citsiretcarahCroticapaCy titnauQy titnauQ ytitnauQ ytitnauQy titnauQ gnikroWg nikroW gnikroW gnikroWg nikroW egatloVe gatloV egatloV egatloVe gatloV) Fµ(eulaV) Fµ(eulaV )Fµ(eulaV )Fµ(eulaV) Fµ(eulaV tnelaviuqE)RSE(t nelaviuqE)RSE( tnelaviuqE)RSE( tnelaviuqE)RSE(t nelaviuqE)RSE( ecnatsiseRseireSe cnatsiseRseireS ecnatsiseRseireS ecnatsiseRseireSe cnatsiseRseireS mumixaMC°58m umixaMC°58 mumixaMC°58 mumixaMC°58m umixaMC°58 elppiRe lppiR elppiR elppiRe lppiR )smrI(tnerruC) smrI(tnerruC )smrI(tnerruC )smrI(tnerruC) smrI(tnerruC lacisyhPl acisyhP lacisyhP lacisyhPl acisyhP )mm(eziS) mm(eziS )mm(eziS )mm(eziS) mm(eziS tupnIt upnI tupnI tupnIt upnI suBsuB suB suBsuB tuptuOt uptuO tuptuO tuptuOt uptuO suBsuB suB suBsuB rebmuNrodneVr ebmuNrodneV rebmuNrodneV rebmuNrodneVr ebmuNrodneV cinosanaP CF V52 V53 V53 Fµ065 Fµ093 Fµ033 W5600.0 W560.0 W711.0 Am5021 Am5021 Am555 51x5.21 51x5.21 5.11x8 )a( S165E1CFUEE S193V1CFUEE 133C1CFUEE detinU noc-imehC /SF/VXL ZXL V61 V53 V01 V02 Fµ033 Fµ074 Fµ033 Fµ051 W021.0 W250.0 W520.0 W2/030.0 Am555 Am0221 Am0053 Am0023 21x8 02x01 5.01x01 5.01x01 )a( )R/N( )R/N( LL21X8M133BV61ZXL LL02X01M174BV53ZXL M033SF01 M051SF02 nocihciN LP MP V53 V53 V05 Fµ065 Fµ033 Fµ074 W840.0 W2/560.0 W640.0 Am0631 Am0201 Am0741 51x61 51x5.21 51x81 6HHM165V1LPU 6HHM133V1LPU 6HHM1174H1MPU cinosanaP CF gtMecafruS V01 V53 V61 Fµ0001 Fµ033 Fµ033 W340.0 W560.0 W051.0 Am5021 Am5021 Am076 5.61x21 61x5.21 2.01x01 )a( QL201A1CFVEE QL133V1CFVEE P133C1CFVEE SS-nocsO VS V01 V01 V02 Fµ033 Fµ033 Fµ051 W520.0 W520.0 W2/420.0 Am0053> Am0083> Am0063 5.01x0.01 3.01x3.01 3.01x3.01 )R/N( )R/N( )R/N( M033SS01 M003VS01 M051VS02 tnuoMecafruS=VS XVA mulatnaT SPT V01 V01 V01 Fµ033 Fµ033 Fµ022 W2/001.0 W2/001.0 W590.0 Am0052> Am0003> Am0002> xL3.7 xW3.4 H1.4 0010R010M733VSPT 0600R010M733VSPT 0010R5010M722VSPT temeK 015T 594T V01 V01 Fµ033 Fµ022 W330.0 W530.0=2/W070.0 Am0041 Am0002> W7.5xL3.7 H0.4x SA010M733X015T SA010M722X594T eugarpS D495 V01 V01 Fµ033 Fµ022 W0540.0 W560.0 Am0532 Am0002> xL3.7 xW0.6 H1.4 T2R0100X733D4 T2D0100X722D495

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