Datasheet

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TPS5602

DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER

SLVS217 – JUNE 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Independent Dual Channels

Hysteretic Control for Fast Transient

Response

4.5-V to 25-V Input Voltage Range

Adjustable Output Voltage Down to 1.2 V

Synchronous Rectifier Enables Efficiencies

of >95%

Minimized External Component Count

Separate Standby Control and Over Current

Protection

Low Supply Current . . . 0.8 mA Typ

30-Pin TSSOP

Low Standby Current (1-µA maximum)

EVM Available (TPS5602EVM-121)

description

The TPS5602 is a dual-channel synchronous

buck switch-mode power supply controller

featuring very fast feedback control and minimized component count. By using the hysteretic control method,

it is ideal for high-transient current applications, such as ’C6000 and multiple ’C54x DSPs. The TPS5602 is

designed specifically for DSP applications that require high efficiency. Since both channels are independent,

the up and down power sequencing can be easily achieved by properly setting the standby pins. The wide input

voltage and adjustable output voltage make the TPS5602 suitable for many applications.

typical design

GND

5 V

OUT2

OUT1

1.8 V

3.3 V

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

DBT PACKAGE

(TOP VIEW)

INV1

SOFTSTART1

GND

REF

STBY1

STBY2

COMP

SOFTSTART2

INV2

LH1

OUT1_u

LL1

OUT1_d

OUTGND1

TRIP1

SENSE

TRIP2

Vref5

REG5V_IN

OUTGND2

OUT2_d

LL2

OUT2_u

LH2

NC – No internal connection

Summary of content (27 pages)

PAGE 1
TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 D D D D D D D D D D D DBT PACKAGE (TOP VIEW) Independent Dual Channels Hysteretic Control for Fast Transient Response 4.5-V to 25-V Input Voltage Range Adjustable Output Voltage Down to 1.2 V Synchronous Rectifier Enables Efficiencies of >95% Minimized External Component Count Separate Standby Control and Over Current Protection Low Supply Current . . . 0.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 AVAILABLE OPTIONS PACKAGE TA TSSOP (DBT) TPS5602IDBT – 40°C to 85°C TPS5602IDBTR EVM TPS5602EVM 121 TPS5602EVM-121 functional block diagram SFT1 SOFT START1 LH1 INV1 Hysteretic Comp. OUT1_u DLY LL1 1.185 V Setup trigger OUT1_d DLY OUTGND1 Current Comp. TRIP1 OSC on CT OSC VccSENSE Fixed off–time reset Current Protection Trigger Trigger on Comp 1.1 V TRIP2 GND Setup trigger Current Comp.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 Terminal Functions TERMINAL NAME NO.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 detailed description (continued) hysteretic comparator Each channel has a hysteretic comparator to regulate the output voltage of the synchronous-buck converter. The hysteresis is set internally and is typically 8.5 mV. The total delay from the comparator input to the driver output is typically 500 ns from low to high and 350 ns from high to low.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 absolute maximum ratings over operating free-air temperature (see Note 1) (unless otherwise noted)† Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 27 V Input voltage, VI, INV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 quiescent current PARAMETER TEST CONDITIONS ICC Operating current without switching Both STBY >2.5 V, VI = 4.5 V to 25 V No switching I(CCS) Stand-by current Both STBY <0.5 V, VI = 4.5 V to 25 V MIN TYP MAX UNIT 0.8 1.5 mA 1 1000 nA MIN TYP MAX UNIT 5.5 8.5 11.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 electrical characteristics over recommended free-air temperature range, VCC = 7 V (unless otherwise noted) (continued) 5-V internal switch PARAMETER VTLH VTHL Threshold voltage Rson On-time resistance Vhys Hysteresis TEST CONDITIONS MIN TYP MAX 4.2 4.9 4.1 4.7 2.5 50 8 UNIT V Ω 250 mV UNIT current limit PARAMETER TEST CONDITIONS Internal current source MIN TYP MAX 10 15 20 Input offset voltage 2.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 TYPICAL CHARACTERISTICS QUIESCENT CURRENT (BOTH CHANNEL STANDBY) vs SUPPLY VOLTAGE QUIESCENT CURRENT (BOTH CHANNELS ON) vs SUPPLY VOLTAGE 160.0 950 140.0 TJ = 125°C I (off) – Quiescent Current – nA I(qon) – Quiescent Current – µ A 900 TJ = 25°C 850 800 TJ = –40°C 750 700 650 120.0 TJ = 125°C 100.0 80.0 60.0 40.0 20.0 0.0 600 4.5 7.0 VCC – Supply Voltage – V 25.0 4.5 15.0 20.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 TYPICAL CHARACTERISTICS SOFTSTART CAPACITANCE vs SOFTSTART TIMING CURRENT-PROTECTION SOURCE CURRENT vs SUPPLY VOLTAGE I(trip) – Current-Protection Source Current – µ A C(start) – Softstart Capacitance – µ F 1 0.1 0.01 0.001 1 13.8 TJ = 125°C 13.6 TJ = 25°C 13.4 13.2 TJ = –40°C 13.0 12.8 12.6 100 10 T(start) – Softstart Timing – ms 14.0 4.5 7.0 15.0 20.0 25.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 TYPICAL CHARACTERISTICS STANDBY THRESHOLD (L–H) vs JUNCTION TEMPERATURE UVLO THRESHOLD VOLTAGE vs JUNCTION TEMPERATURE 2.5 3.80 V(stby) – Threshold Voltage – V UVLO Threshold Voltage – V 3.78 3.76 3.74 3.72 3.70 3.68 3.66 2.0 1.5 1.0 0.5 3.64 3.62 3.60 0.
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Open LH1 OUTGND2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 LH2 OUT2U 15 R9 R8 15 Figure 13. EVM Schematic Diagram INV2 NC COMP OUT2D SOFTSTART2 LL2 VCC 5Vin TRIP2 VREF5 STBY1 STBY2 REF TRIP1 NC VCCSENSE Ct GND OUT1D OUTGND1 NC LL1 OUT1L SOFTSTART1 NC INV1 1.8 V 4A 5–9 V 5A VI VO 3A 3.3 V 3.3 V 1.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 APPLICATION INFORMATION application for DSP power The design shown in this data sheet is a reference design for a DSP application. An evaluation module (EVM), TPS5602EVM-121 (SLVP121), is available for customer testing and evaluation. The intent is to allow a customer to fully evaluate the given design using the plug-in EVM supply shown here. The input voltage for this EVM is from 4.5 V to 9 V. The outputs are 1.
PAGE 13
TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 APPLICATION INFORMATION application for DSP power (continued) output capacitor RMS current Assuming the inductor ripple current totally goes through the output capacitor to ground, the RMS current in the output capacitor can be calculated as: Io(rms) + ǸD12I Where Io(rms) is the maximum RMS current in the output capacitor (A); ∆I is the peak–to–peak inductor ripple current (A). Example: ∆ I = 2 A, so Io(rms) = 0.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 APPLICATION INFORMATION application for DSP power (continued) sequencing and under voltage protection The EVM design uses the standby pins to implement power sequencing. There are two ways to achieve the protection: one uses a voltage supervisory circuit such as the TI TPS3305-18, the other uses a low cost comparator, such as the TI TLV1391.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 APPLICATION INFORMATION layout considerations (continued) D D D D D D D When configuring the high-side driver as a floating driver, the connection from LL to the power FETs should be as short and as wide as possible. When configuring the high-side driver as a floating driver, the bootstrap capacitor (connected from LH to LL) should be placed close to the TPS5602.
PAGE 16
TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 APPLICATION INFORMATION COMBINED SYSTEM EFFICIENCY 3.3-V OUTPUT LOAD REGULATION 94 3.32 I(1.8) = 4 A I(3.3) = 3 A 93 VO – Output Voltage – V % 92 Efficiency 91 90 89 88 3.315 3.31 3.305 87 86 3.3 10 20 30 40 50 60 70 80 90 100 Percentage of Output Current on Both Channels – % 0 0.1 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 IO – Output Current – A Figure 16 Figure 17 3.3-V LINE REGULATION 1.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 APPLICATION INFORMATION 1.8-V OUTPUT LINE REGULATION OUTPUT VOLTAGE RIPPLE 1.805 VO – Output Voltage – V 1.8 50 mV/div 1.795 ∆V = 48 mV 1.79 1.785 1.78 1.775 VI = 5 V 5 µs/div 4.5 5 7 9 11 13 15 17 19 21 23 25 VI – Input Voltage – V Figure 21 Figure 20 POWER-UP SEQUENCING POWER-DOWN SEQUENCING 3.3 V 200 ms 3.3 V 1 V/div 1 V/div 1.8 V 1.
PAGE 18
TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 APPLICATION INFORMATION TRANSIENT RESPONSE (OVERSHOOT) 90 A/µs 1 A/div ∆ = 100 mV 100 mV/div 5 µs/div Figure 24 TRANSIENT RESPONSE (UNDERSHOOT) 6.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 APPLICATION INFORMATION Table 1. SLVP121 Bill of Materials REF. C1† PART NUMBER MFR.
PAGE 20
TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 APPLICATION INFORMATION To change the EVM operating specifications, several suggestions are shown in the following table. HIGH INPUT VOLTAGE (TO 25 V) 2.5 V OUTPUT VOLTAGE LOW-COST POWER SEQUENCING Change R1 to 1 kΩ Remove U3 Add R15 (1 kΩ) Change Rt to 1.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 APPLICATION INFORMATION BOARD ASSEMBLY POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 21
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 APPLICATION INFORMATION Power Supply Load 5–V, 5–A Supply – 0–5A + Load 0–5A NOTE: All wire pairs should be twisted. Figure 26.
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TPS5602 DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER SLVS217 – JUNE 1999 MECHANICAL DATA DBT (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 30 PINS SHOWN 0,50 0,27 0,17 30 16 0,08 M 0,15 NOM 4,50 4,30 6,60 6,20 Gage Plane 0,25 1 15 0°– 8° 0,75 0,50 A Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,10 28 30 38 44 50 A MAX 7,90 7,90 9,80 11,10 12,60 A MIN 7,70 7,70 9,60 10,90 12,40 DIM 4073252/D 09/97 NOTES: A. B. C. D. All linear dimensions are in millimeters.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 18-Jun-2009 TAPE AND REEL INFORMATION *All dimensions are nominal Device TPS5602IDBTR Package Package Pins Type Drawing TSSOP DBT 30 SPQ Reel Reel Diameter Width (mm) W1 (mm) 2000 330.0 16.4 Pack Materials-Page 1 A0 (mm) B0 (mm) K0 (mm) P1 (mm) 6.95 8.3 1.6 8.0 W Pin1 (mm) Quadrant 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 18-Jun-2009 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS5602IDBTR TSSOP DBT 30 2000 346.0 346.0 33.
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