PT6526

PT652X TI | Alldatasheet

Document overview

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Technical content

Features

• 8A Rated Output Current
• Single Device: 3.3V/5V Input
• High Efficiency (92% for PT6521)
• Small Footprint (0.75 in², Suffix ‘P’)
• Output On/Off Standby Control
• Output Short-Circuit Protection
• Adjustable Output Voltage
• Soft Startup
• 16-pin Mount Option (Suffixes L, M, Q, & F) PT6520 Series 8-A 5-V/3.3-V Input Adjustable ISR with Short-Circuit protection SLTS104A (Revised 1/25/2002) Pin-Out Information Pin Function

1 Remote Sense

2 Do Not Connect

3 STBY*

7 GND

8 GND

9 GND

10 GND

11 V out

12 V out

13 V out

14 V out Adjust

• For further information, see application notes.

Description

These power modules are a series of high performance, 8-A rated, Integrated Switching Regulators (ISRs), housed in a low cost 14-Pin SIP (Single In-line Pack- age). Operating from either a 3.3V or 5V standard power bus, the PT6520 series produces a high-output, low-voltage power source for the industry’s latest high-speed, microprocessors, ASICs, & DSPs. This allows for the easy integration of these new low-voltage ICs into existing 3.3V or 5V systems without re-designing the power supply. The PT6520 series features an output On/Off standby pin and output short- circuit protection. C OUT C IN LOAD VoADJ VIN COM VOUT COM VoSENSE PT6520 11,12,13 7–10 4,5,6

Ordering Information

PT6521/GA8= 3.3 Volts † PT6522/GA8= 1.5 Volts † PT6523/GA8= 2.5 Volts † PT6525/GA8= 2.1 Volts † PT6526/GA8= 1.8 Volts † PT6527/GA8= 1.2 Volts † 3.3V Input Bus Capable Note: Back surface of product is electrically conductive PT6520 PT Series Suffix (PT1234x) Case/Pin Order Package Configuration Suffix Code * Vertical P (EED) Horizontal D (EEA) SMD E (EEC) Horizontal, 2-Pin Tab M (EEM) SMD, 2-Pin Tab L (EEL) Horizontal, 2-Pin Ext Tab Q (EEQ) SMD, 2-Pin Ext Tab F (EEF) Vertical, Side Tab R (EEE) Horizontal, Side Tab G (EEG) SMD, Side Tab B (EEK) * Previously known as package styles 400/410. (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 PT6520 Series 8-A 5-V/3.3-V Input Adjustable ISR with Short-Circuit protection Specifications (Unless otherwise stated, Ta =25°C, Vin =5V, Cin =330µF, Cout =330µF, and Io =Iomax) PT6520 SERIES Characteristic Symbol Conditions Min Typ Max Units Output Current I o Over Vin range 0.1 (1) — 8.0 A Set Point Voltage Tolerance V o tol — ±1 ±1.5 %V o Temperature Variation Reg temp –40° ≤Ta ≤ +85°C, Io =Iomin — ±0.5 — %V o Line Regulation Reg line Over Vin range — ±5 ±10 mV Load Regulation Reg load Over Io range — ±5 ±10 mV Total Output Voltage Variation ∆Votot Includes set-point, line, load, —± 2± 3% V o–40° ≤Ta ≤ +85°C Efficiency η Io =3.0A V o =3.3V — 92 — Vo =2.5V — 88 — Vo =1.5V — 80 — Vo =1.2V — 75 — Io =8.0A V o =3.3V — 89 — Vo =2.5V — 85 — Vo =1.5V — 75 — Vo =1.2V — 71 — Vo Ripple (pk-pk) V r 20MHz bandwidth — 35 — mV pp Transient Response t tr 1A/µs load step, 50% to 100% Iomax — 50 — µs ∆Vtr Vo over/undershoot — ±70 — mV Short Circuit Threshold I sc threshold — 12 22.5 A Switching Frequency ƒ s Over Vin and Io range 300 350 400 kHz Remote On/Off (Pin 1) Referenced to –V in (pin 7) Input High Voltage V IH — — Open (2) V Input Low Voltage V IL –0.1 — +0.4 Input Low Current I IL — –0.5 – mA Standby Input Current I in standby pins 3 & 7 connected — 15 25 mA External Output Capacitance C out See application schematic 330 — 5,000 µF External Input Capacitance C in See application schematic 330 — — µF Operating Temperature Range T a Over Vin range -40 — +85 (3) °C Storage Temperature T s — -40 — +125 °C Reliability MTBF Per Bellcore TR-332 6.3 — — 10 6 Hrs50% stress, Ta =40°C, ground benign Mechanical Shock — Per Mil-Std-883D, method 2002.3, — 500 — G’s 1ms, half-sine, mounted to a fixture Mechanical Vibration — Suffixes P, D, & E— 7.5 — G’sMil-Std-883D, 20-2000Hz Suffixes L & M — TBD (4) — Weight — Suffixes P, D, & E— 12.5 — Suffixes R, G & B — 16.5 — grams Suffixes L & M — 15.25 — Suffixes Q & F — 22 — Flammability — Materials meet UL 94V-0 Notes: (1) The ISR will operate at no load with reduced specifications. (2) The STBY* control (pin 3) has an internal pull-up and if it is left open circuit the module will operate when input power is applied. The open-circuit voltage is typically 12.6V, and maybe as high as 15V. Refer to the application notes for other interface considerations. (3) See Safe Operating Area curves or contact the factory for the appropriate derating. (4) The tab pins on the 16-pin mount package types (suffixes L & M) must be soldered. For more information see the applicable pa ckage outline drawing. Input/Output Capacitors: The PT6520 series requires a 330µF capacitor at both the input and output for proper operation in all applications. In addition, the input capacitance (Cin) must be rated for a minimum of 1.2Arms ripple current rating. For transient or dynamic load applications, additional output capacitance (C out) may be necessary. The maximum allowable output capacitance is 5,000µF. For more information consult the related application note on capacitor recommendations.

For technical support and more information, see inside back cover or visit www.ti.com 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 Typical CharacteristicsPT6520 Series 8-A 5-V/3.3-V Input Adjustable ISR with Short-Circuit protection Characteristic Data; Vin =5.0V (See Note A) Characteristic Data; Vin =3.3V (See Note A) Efficiency vs Output Current Efficiency vs Output Current Power Dissipation vs Output Current Power Dissipation Output Current Safe Operating Area; 3.3V (See Note B) Safe Operating Area; Vin =5V (See Note B) 012345678 Iout (A ) Ripple - mV 3.3V 2.5V 1.8V 1.2V VOUT 012345678 Iout (A ) Pd - Watts 1.2V 1.8V 2.5V 3.3V VOUT 012345678 Iout (A ) Ripple - mV 2.5V 1.8V 1.2V VOUT Output Ripple vs Output Current Output Ripple vs Output Current 012345678 Iout (A ) Pd - Watts 1.2V 1.8V 2.5V VOUT 012345678 Iout (A ) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow 100 012345678 Iout (A ) Efficiency - % 3.3V 2.5V 1.8V 1.2V VOUT 100 012345678 Iout (A ) Efficiency - % 2.5V 1.8V 1.2V VOUT 012345678 Iout (A ) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow

For technical support and more information, see inside back cover or visit www.ti.com Application Notes Using the Standby Function of the PT6520 Series of Integrated Switching Regulators The PT6520 series of power modules are high efficiency regulators that operate off either a 3.3V or 5V input bus voltage. T hese regulators incorporate a Standby function, which may be used in applications that require power-up/shutdown sequencing, and wherever there is a requirement for the output status of the module to be controlled by external circuitry. The standby function is provided by the STBY* control, pin 3. If pin 3 is left open-circuit 1 the regulator operates normally, and provides a regulated output when a valid supply voltage is applied to V in (pins 4–6) with respect to GND (pins 7–10). If a low voltage 2 is then applied to pin 3 the regulator output will be disabled and the input current drawn by the ISR will be reduced to about 15mA 3. The standby control may also be used to hold-off the regulator output during the period that input power is applied. Pin 3 is ideally controlled with an open-collector (or open- drain) discrete transistor (See Figure 1). The open-circuit voltage is typcially 12.6V. Table 1 gives the circuit pa- rameters for this control input. Table 1 Standby Control Requirements (2, 3) Parameter Min Typ Max Input Low (VIL) –0.1V +0.4V Istby (pin 3 =ground) –0.5mA Vstby (open circuit) 12.6V 15V Notes:

1 The standby control input requires no external pull-up

resistor. The open-circuit voltage of the STBY* pin is typically 12.6V. 2. The standby control input is Not compatible with TTL or other devices that incorporate a totem-pole output drive. Use only a true open-collector device, preferably a discrete bipolar transistor (or MOSFET). To ensure the regulator output is disabled, the control pin must be pulled to less than 0.4Vdc with a low-level 0.5mA sink to ground. 3. When the regulator output is disabled the current drawn from the input source is typically reduced to 15mA. Figure 1 Turn-On Time: In the circuit of Figure 1, turning Q1 on applies a low voltage to the STBY control (pin 3) and disables the regulator ouput. Correspondingly, turning Q 1 off removes the low-voltage signal and enables the output. Once enabled, the output will typically experience a 10–15ms delay followed by a predictable ramp-up of voltage. The regulator should provide a fully regulated output voltage within 40ms. The waveform of Figure 2 shows the output voltage and input current waveforms of a PT6521 (3.3V) following the turn-off of Q 1. The turn off of Q1 corresponds to the rise in Vstby. The waveforms were measured with a 5Vdc input voltage, and 4.5A resistive load. Figure 2 C in C out Inhibit V in V o COMCOM PT6520 11,12,13 147,8,9,10 4,5,6 Vin Vo GND Vo(adj)STBY Vo(sense) BSS138 PT6520 Series Vo (1V/Div) Iin (2A/Div) Vstby (10V/Div) HORIZ SCALE: 5ms/Div

For technical support and more information, see inside back cover or visit www.ti.com PT6520 Series Adjusting the Output Voltage of the PT6520 Series of Integrated Switching Regulators The output voltage of the PT6520 series of integrated switching regulators (ISRs) may be adjusted higher or lower than the factory trimmed pre-set voltage with the addition of a single external resistor.

1 Table 1 gives the

allowable adjustment range for each model in the series as Va (min) and Va (max). Adjust Up: An increase in the output voltage is obtained by adding a resistor R2, between pin 14 (Vo adjust) and pins 7-10 (GND). Adjust Down: Add a resistor (R1), between pin 14 (Vo ad- just) and pin 1 Vo(sense) 3. Refer to Figure 1 and Table 2 for both the placement and value of the required resistor, either (R 1) or R2 as appropriate. The values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulas. Ro ( Va –Vr )(R1) = Vo – Va – Rs kΩ Ro ·Vr – Rs kΩR2 = Va – Vo Where: Vo = Original output voltage Va = Adjusted output voltage Vr = The reference voltage (Table 1) Ro = The multiplier resistance (Table 1) Rs = The internal series resistance (Table 1) Figure 1 C in C out (R1) Adj Down Adj Up Vo COM Vin COM PT6520 11,12,13 147,8,9,10 4,5,6 Vin Vout GND Vo (ad j)STBY Vo (sense ) L O A D Table 1 ADJUSTMENT AND FORMULA PARAMETERS Series Pt # PT6527 PT6522 PT6526 PT6525 PT6523 PT6521 Notes: 1. Use only a single 1% resistor in either the (R1) or R2 location. Place the resistor as close to the ISR as possible. 2. Never connect capacitors from Vo adjust to either GND, Vout, or the Remote Sense pin. Capacitance added to the Vo adjust pin will affect the stability of the ISR. 3. If the Remote Sense feature is not being used, the resistor (R1) may be connected between pin 14 (V o adjust) and pins 11–13 (Vout). 4. Adjusting the output voltage of the PT6523 (2.5V model) higher than the factory pre-trimmed output voltage may increase the minimum input voltage specified for the part. This model must comply with the following requirements. PT6523: V in(min) = (Va + 0.5)V or 3.1V, whichever is greater.

For technical support and more information, see inside back cover or visit www.ti.com Application Notes continued PT6520 Series Series Pt # PT6527 PT6522 PT6526 PT6525 PT6523 Va (req’d) 1.1 (5.1)kΩ 1.15 (45.1)kΩ 1.2 1.25 135.0k Ω 1.3 55.1k Ω 1.35 28.4k Ω 1.4 15.1k Ω 1.45 7.1k Ω 1.47 4.7k Ω (18.1)kΩ 1.5 1.8k Ω 1.55 209.0k Ω 1.6 79.6k Ω 1.65 36.5k Ω 1.7 14.9k Ω 1.75 (46.1)kΩ 1.8 1.85 204.0k Ω 1.9 77.1k Ω 1.95 34.8k Ω (12.1)kΩ 2.0 13.6k Ω (39.8)kΩ 2.05 (123.0)kΩ 2.1 2.15 221.k Ω 2.2 93.8k Ω 2.25 51.5k Ω (6.0)kΩ 2.3 30.3k Ω (18.3)kΩ 2.35 17.6k Ω (38.8)kΩ 2.45 3.1k Ω (203.0)kΩ 2.5 2.55 221.0kΩ 2.6 93.8kΩ 2.65 (See Note 4) 51.5k Ω 2.7 30.3kΩ 2.75 17.6kΩ 2.8 9.1kΩ 2.85 3.1kΩ R1 = (Blue) R2 = Black Table 2 PT6520 ADJUSTMENT RESISTOR VALUES Series Pt # PT6521 Vo (nom) 3.3V Va (req’d) 2.75 (2.0)kΩ 2.8 (5.7)kΩ 2.85 (10.2)kΩ 2.9 (15.9)kΩ 2.95 (23.1)kΩ 3.0 (32.8)kΩ 3.05 (46.3)kΩ 3.1 (66.6)kΩ 3.15 (100.0)kΩ 3.2 (168.0)kΩ 3.25 (371.0)kΩ 3.3 3.35 229.0k Ω 3.4 102.0k Ω 3.45 59.8k Ω 3.5 38.6k Ω 3.55 25.9k Ω 3.6 17.4k Ω 3.65 11.4k Ω 3.7 6.9k Ω 3.75 3.3k Ω

For technical support and more information, see inside back cover or visit www.ti.com Table 1: Input/Output Capacitors N/R –Not recommended. The ripple current rating and ESR does not meet the requirements. Capacitor Recommendations for the PT6520 Series of Integrated Switching Regulators 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 <100m Ω equivalent series resistance (ESR) values are the major considerations, along with temperature, when designing with different types of capacitors. Tantalum capacitors have a recom- mended minimum voltage rating of 2 × the maximum DC voltage + AC ripple. This is necessary to insure reliability for input voltage bus applications Output Capacitors: The ESR of the required capacitor (C out) must not be greater than 150mΩ . Electrolytic capacitors have poor ripple performance at frequencies greater than 400kHz but excellent low frequency transient response. Above the ripple frequency, 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. PT6520 Series Tantalum Capacitors Tantalum type capacitors may be used for the output but only the AVX TPS series, Sprague 593D/594/595 series or Kemet T495/T510 series. These capacitors are rec- ommended over many other tantalum 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 less reliable than the AVX TPS series when determining power dissipation capability. Tantalum or Oscon® types are recommended for appli- cations 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 cur- rent (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. roticapaC /rodneV tnenopmoC seireS scitsiretcarahCroticapaCy titnauQ gnikroW egatloV) Fµ(eulaV tnelaviuqE)RSE( ecnatsiseRseireS elppiRmumixaMC°58 )smrI(tnerruC lacisyhP )mm(eziS tupnI suB tuptuO suB rebmuNrodneV cinosanaP CF V52 V53 V53 Fµ065 Fµ093 Fµ033 5600.0 Ω 560.0 Ω 711.0 Ω Am5021 Am5021 Am555 51x5.21 51x5.21 5.11x8 R/N S165E1CFUEE S193V1CFUEE 133C1CFUEE detinU noC-imehC /SF/VXL ZXL V61 V53 V01 V02 Fµ033 Fµ074 Fµ033 Fµ051 021.0 Ω 250.0 Ω 520.0 Ω 030.0 ÷2Ω Am555 Am0221 Am0053 Am0023 21x8 02x01 5.01x01 5.01x01 R/N LL21X8M133BV61ZXL LL02X01M174BV53ZXL M033SF01 M051SF02 nocihciN MP/LP V53 V53 V05 065F µ 033F µ 074F µ 840.0 Ω 560.0 ÷2Ω 640.0 Ω Am0631 Am0201 Am0741 51x61 51x5.21 51x81 6HHM165V1LPU 6HHM133V1LPU 6HHM1174H1MPU cinosanaP CF )gtMecafruS( V01 V53 V61 0001F µ 033F µ 033F µ 340.0 Ω 560.0 Ω 051.0 Ω Am5021 Am5021 Am076 5.61x21 61x5.21 2.01x01 R/N QL201A1CFVEE QL133V1CFVEE P133C1CFVEE SS-nocsO VS V01 V01 V02 033F µ Fµ033 051F µ 520.0 Ω 520.0 Ω 420.0 ÷2Ω Am0053> Am0083> Am0063 5.01x0.01 3.01x3.01 3.01x3.01 M033SS01 M003VS01 M051VS02 tnuoMecafruS=VS XVA mulatnaT SPT V01 V01 V01 Fµ033 Fµ033 Fµ022 001.0 ÷2Ω 001.0 ÷2Ω 590.0 Ω Am0052> Am0003> Am0002> xL3.7 xW3.4 H1.4 0010R010M733VSPT 0600R010M733VSPT 0010R5010M722VSPT temeK /015T 594T V01 V01 Fµ033 Fµ022 330.0 Ω 70.0 ÷Ω 530.0=2 Ω Am0041 Am0002> W7.5xL3.7 H0.4x SA010M733X015T SA010M722X594T eugarpS D495 V01 V01 Fµ033 Fµ022 540.0 Ω 560.0 Ω Am0532 Am0002> xL3.7 xW0.6 H1.4 T2R0100X733D4 T2D0100X722D495

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