TPP60308 3PEAK | Alldatasheet

Document overview

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  • PDF pages: 22

Technical content

Features

  • High Efficiency at Light Loads with Pulse Skipping
  • 80-mΩ High-Side MOSFET
  • 160-μA Operating Quiescent Current and 2.25- μA Shutdown Current
  • 100-kHz to 2.5-MHz Adjustable Switching Frequency
  • Integrated PLL to Synchronize with External Clock
  • Adjustable UVLO Voltage and Hysteresis
  • Soft-Start and Sequencing
  • 0.8-V 1.5% Internal Voltage Reference
  • 8-Pin ESOP8 with Exposed Pad Package
  • –40°C to 125°C Operation Ambient Temperature Range

Applications

  • 12-V, 24-V, 48-V Industrial Power Application
  • Telecom & Communication Equipment Power

Description

The TPP60308 is a 60-V, 3.5-A output, non-synchronous, step-down, and switch-mode converter with integrated high-side power MOSFET. The TPP60308 employs current-mode control supporting simple external compensation and flexible component selection. It also supports low quiescent current mode with pulse-skipping and ultra-low sleep current. With the integrated phase-locked loop, the TPP60308 can synchronize with an external clock source with wide frequency selection, optimized for efficiency, physical dimensions, and electromagnetic interference (EMI). Protection and diagnostic features protect the device as well as the system power supply. The soft-start feature controls the output ramping. Current limit, frequency foldback, and over-temperature protection improve system-level robustness. Typical Application Circuit SW VIN GND BOOT FB COMPEN RT/CLK VOUT VIN 4.5 – 60V TPP60308 EN TPP60308 60-V 3.5-A Step-Down DC/DC Converter www.3peak.com 1 / 22 EA20230203A0

60-V 3.5-A Step-Down DC/DC Converter www.3peak.com 2 / 22 EA20230203A0

Revision History

2023-09-26 Rev.A.0 Initial Revision TPP60308 60-V 3.5-A Step-Down DC/DC Converter www.3peak.com 3 / 22 EA20230203A0

Table 1. Pin Functions: TPP60308 capacitor with 10-V or higher voltage rating. 2 VIN O Supply voltage with 4.5-V to 60-V operating range.

4 RT/CLK –

5 FB I Feedback input, connected to internal inverting input of gm error amplifier.

6 COMP I/O Error amplifier output and input to the PWM comparator, Connect frequency

compensation network to this pin.

Absolute Maximum Ratings (1) Parameter Min Max Unit VIN Supply Voltage −0.3 65 V SW Switching Node Voltage −0.6 VIN + 0.3 V Switching Node Voltage, SW 5-ns Transient −7 VIN + 0.3 V Switching Node Voltage, SW 10-ns Transient −2 VIN + 0.3 V BOOT – SW Bootstrap Voltage −0.3 6.5 V FB Feedback Voltage −0.3 3 V COMP Compensation Voltage −0.3 3 V EN Enable Input Voltage −0.3 8.4 V RT/CLK Switching frequency setting / PLL Input −0.3 3 V TJ Operating Junction Temperature Range −40 150 °C TA Ambient Temperature Range −40 125 °C TSTG Storage Temperature Range −65 150 °C TL Lead Temperature (Soldering, 10 sec) 260 °C (1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. ESD, Electrostatic Discharge Protection Parameter Condition Minimum Level Unit HBM Human Body Model ESD ANSI/ESDA/JEDEC JS-001 (1) ±2 kV CDM Charged Device Model ESD ANSI/ESDA/JEDEC JS-002 (2) ±1 kV (1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. (2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. Recommended Operating Conditions Parameter Min Max Unit VIN Power Supply Voltage 4.5 60 V VO Output Voltage Range 0.8 58 V IO Output Current Range 0 3.5 A TJ Operating Junction Temperature Range –40 150 °C TPP60308 60-V 3.5-A Step-Down DC/DC Converter www.3peak.com 5 / 22 EA20230203A0

Package Type θJA θJC Unit ESOP8 53.1 75.2 °C/W TPP60308 60-V 3.5-A Step-Down DC/DC Converter www.3peak.com 6 / 22 EA20230203A0

Electrical Characteristics

All test conditions: VIN = 4.5 V to 60 V, TJ = −40°C to 150°C, unless otherwise noted. Parameter Conditions Min Typ Max Unit Power Supply VIN Operating Voltage Range 4.5 60 V V(UVLO) Internal Under-voltage Lockout Threshold Rising threshold 4.1 4.3 4.48 V V(UVLO,hys) 325 mV IQ Quiescent Supply Current EN = 5 V, TA = 25 °C, V(FB) = 0.9 V 152 200 μA IQSD Shut-down Supply Current EN = 0 V, TA = 25 °C 2.25 50 μA VFB Voltage VFB VFB Threshold Voltage 0.788 0.8 0.812 V MOSFFET HSRDSON HS Switching On-Resistance VIN = 12 V, BOOT − SW = 5 V 80 185 mΩ Current Limit ILimit Current Limit Full voltage and temperature range, Open-Loop 4.5 5.5 6.8 A Full temperature range, VIN = 12 V, Open-Loop 4.5 5.5 6.25 A TA = 25 °C, VIN = 12 V, Open- Loop 5.2 5.5 5.85 A Error Amplifier I(FB) Input Current 50 nA gm Error Amplifier Transconductance −2 μA < ICOMP < 2 μA, VCOMP = 1 V 350 μMhos gm Error Amplifier Transconductance during Soft-Start −2 μA < ICOMP < 2 μA, VCOMP = 1 V， VFB = 0.4 V 77 μMhos ADC Error Amplifier Gain V(FB) = 0.8 V 10000 V/V f(GBW),min Minimal Unity Gain Bandwidth 2500 kHz I(COMP) Error Amplifier Output Current Capability V(COMP) = 1 V , 100-mV overdrive ±31 μA gCOMP-SW COMP to SW Current Transconductance 12 A/V Thermal Shutdown TSD Thermal Shutdown Temperature 161 °C THYS Thermal Hysteresis 20 °C LOGIC VEN EN Threshold Voltage 1.1 1.2 1.3 V TPP60308 60-V 3.5-A Step-Down DC/DC Converter www.3peak.com 7 / 22 EA20230203A0

Parameter Conditions Min Typ Max Unit IEN EN Threshold + 50 mV −4.6 μA EN Threshold −50 mV −0.58 −1.2 −1.8 μA IEN,hys EN Threshold Hysteresis −2.2 −3.4 −4.5 μA Vth(RT/ CLK),rising RT/CLK Rising Threshold 1.55 2 V Vth(RT/ CLK),falling RT/CLK Falling Threshold 0.5 1.2 V Timing Characteristics tOCP Over-Current Protection Delay 60 ns td,EN Enable to COMP Delay 540 μs tss Soft-start Timer fSW = 500 kHz 2 ms tCLK,min Minimal CLK Input Pulse Width 15 ns td,CLK RT/CLK Falling Edge to SW Rising Edge Delay fSW= 500 kHz 55 ns fSW Switching Frequency RT = 200 kΩ 450 500 550 kHz Switching Frequency using RT Mode 100 2500 kHz Switching Frequency using CLK Mode 160 2300 kHz DMAX Maximum Dutycycle 99.9% tPLL PLL Lock in Time fSW = 500 kHz 78 μs TPP60308 60-V 3.5-A Step-Down DC/DC Converter www.3peak.com 8 / 22 EA20230203A0

also supports low quiescent current mode with pulse-skipping and ultra-low sleep current. for efficiency, physical dimensions, and electro-magnetic interference (EMI). output ramping. Current limit, frequency foldback, and over-temperature protection improves system-level robustness. Figure 19. Functional Block Diagram frequency of switching high-side MOSFET. pin is also clamped for current limiting and pulse-skipping mode.

The transconductance error amplifier converts the error voltage between the FB pin voltage and the internal voltage, whichever lower of the soft-start voltage or internal voltage reference V FB, to current with transconductance gm of 350 μMhos during normal operation conditions. During soft-start operation, transconductance is reduced to ensure smooth soft-start. It is recommended to connect compensation network between the COMP pin and the GND pin to ensure stability across all working ranges. The details are discussed in the application chapter. Setting Output Voltage The precision internal voltage reference produces a 0.8-V voltage reference with ±1.5% tolerance across operating temperature and voltage ranges. The resistor divider from the output voltage to the FB pin sets the output voltage. RH = RL × VOUT − VFB VFB (1) Pulse-Skipping Light-Load Operation The TPP60308 enters pulse-skipping operation when peak switching current is below the internal threshold. In the pulse- skipping mode, the device clamps COMP at 0.6 V and stops switching high-side MOSFET. As the output voltage falls and differential input voltage increase, the error amplifier output increases. When the COMP voltage rises above the pulse skipping threshold, the device resumes switching the high-side MOSFET. The current threshold is equivalent to the current of a nominal COMP voltage at 1 V. As the device uses peak switching current for pulse-skipping threshold, the threshold is also dependent on the output inductance. Soft-Start with Pre-Biased Capability The device has a soft-start feature by controlling ramping up reference voltage. The timing of soft-start is set internally and can be programmed via RT resistance. tss = kss ⋅RRT kss=10-8 RT/CLK The device supports wide switching frequency from 100 kHz to 2500 kHz. The frequency is programmable via resistor connected between RT/CLK and GND. The switching frequency will affect solution size, efficiency, and minimal duty cycle. It is suggested that all factors taken care of when selecting switching frequency. The resistor can be calculated via the following equation: f = k RRT (2) k=1011 The device switching clock supports external clock sources for synchronization. Once a square wave is applied at the RT/CLK pin, the rising edge of SW synchronizes to the falling edge of RT/CLK. It is also suggested to connect a frequency set resistor to RT/CLK pin in case the external clock source is not available. The first rising edge of RT/CLK sets the device from free-running frequency mode to synchronization mode. The internal 0.5-V voltage source is removed and the RT/CLK is set to the high impedance mode. It takes 78 µs to lock on external clock frequency. When the external clock source stops, the device will switch back to the free running frequency mode with frequency set by the external resistor. During the transition, the device frequency will stay at 70 kHz and then switch to the free-running frequency. The device will foldback frequency by 1, 2, 4, and 8 depending on the FB voltage. This is to ensure that during normal start-up and fault conditions, the device is able to increase its period and off time. This is helpful when output is short-circuit to GND, the longer off time allows the inductor current to decay. TPP60308 60-V 3.5-A Step-Down DC/DC Converter www.3peak.com 13 / 22 EA20230203A0

Undervoltage Lockout (UVLO) The device has a undervoltage lockout feature with a default rising threshold of 4.3 V. It can be adjusted by using the EN pin with external resistors. A weak current source of 1.2 µA pulls up the EN pin to the internal voltage rail. Another 3.4-µA hysteresis current source provides the hysteresis voltage between the rising and falling threshold. The resistor values can be calculated via below equations. VSYS_UVLO_H is the desired system-level undervoltage protection rising threshold voltage, V SYS_UVLO_L is the desired system- level undervoltage protection falling threshold voltage. RUVLOH and RUVLOL are depicted in the Figure 8. RUVLOH = VSYS_UVLO_H − VSYS_UVLO_L IEN_hys (3) RUVLOL = VEN VSYS_UVLO_H − VEN RUVLOH + IEN (4) Over-Current Protection The device employs peak current mode control by controlling the peak current of the internal high-side power transistor. The high-side transistor current is converted to a voltage signal and compared to the COMP pin. When the peak switching current is above the threshold set by the COMP voltage, the device turns off the high-side power transistor. When the device is in the over-current scenario, the output voltage is pulled low, and device will increase switching current threshold until it reaches the internal current limit threshold. Once the switching current is above the threshold, the device will turn off the transistor as current limit. Delay needs to be taken in to account that may cause the peak inductor current slightly higher than the open-loop current limit. Once the over-current load is removed, the device will resume normal operation in the following cycle. Over-Voltage Protection The device stops high-side FET switching when it detects the FB voltage is above the over-voltage protection (OVP) rising threshold (108% of internal reference voltage). When the voltage falls below the falling threshold (106% of internal reference voltage), it resumes switching high-side FET. With the OVP feature, the device is able to minimize the voltage overshoot during the load transient with low-output capacitance. Over-Temperature Shutdown When the device senses the junction temperature is above the internal rising threshold of 161°C, the device stops the high-side FET switching. Once the device junction temperature falls below the falling threshold of 141°C, the device restarts the device with power-up sequence. TPP60308 60-V 3.5-A Step-Down DC/DC Converter www.3peak.com 14 / 22 EA20230203A0

RefDes Value Description Package MFR Part No. Qty R1 NC 0 R2 NC 0 C3 NC 0 C7 39pF Capacitor, 39F, 50VDC, X7R, ±5% 0603 muRata GRM1881X1H3 90JA01 1 R3 13K Resistor ,13K, ±1%,0.1W 0603 Viking ARG03FTC130 2 1 C8 6.8F Capacitor, 6.8nF, 50VDC, X7R, ±5% 0603 muRata GRM1881X1H3 90JA01 1 R4 160K Resistor ,160K, ±1%,0.1W 0603 Viking ARG03FTC160 3 1 C9 100nF Capacitor, 100nF, 50VDC, X7R, ±15% 0805 muRata GGD21BR71H1 04KA02 1 D1 diode 60V,7A ,0.62V@5A POWERDI-5 DIODES PDS760-13 1 L1 8.2uH 8.2uH,19.11m Ω,7.2A Rated， 12.8A Satueeted 15×3×15mm Wurth 7448880820 1 R5 49.9R Resistor, 49.9Ω, ±1%, 0.1W 0603 Viking ARG03FTC49R 9 1 C10 NC 0 R6 43K Resistor, 43K, ±1%, 0.1W 0603 Viking ARG03FTC430 2 1 R7 8.2K Resistor, 8.2K, ±1%, 0.1W 0603 Viking ARG03FTC820 1 1 C11 47uF Capacitor, 47uF, 10VDC, X7S, ±10% 1210 muRata GCM32EC71A4 76KE02 1 C12 47uF Capacitor, 47uF, 10VDC, X7S, ±10% 1210 muRata GCM32EC71A4 76KE02 1 C13 NC 0 C14 NC 0 C15 NC 0 TPP60308 60-V 3.5-A Step-Down DC/DC Converter www.3peak.com 16 / 22 EA20230203A0

The following figures show the location of external components as they appear on the PCB.diagram. Layer top Layer Bottom Layer M1 Layer M2 TPP60308 60-V 3.5-A Step-Down DC/DC Converter www.3peak.com 17 / 22 EA20230203A0

（mm） （mm） （mm） （mm） （mm） （mm） （mm） Pin1 Quadrant TPP60308- TPP60308- TPP60308 60-V 3.5-A Step-Down DC/DC Converter www.3peak.com 18 / 22 EA20230203A0

Package Outline Dimensions ESOP8-F TPP60308 60-V 3.5-A Step-Down DC/DC Converter www.3peak.com 19 / 22 EA20230203A0

Order Number Operating Ambient Temperature Range Package Marking Information MSL Transport Media, Quantity Eco Plan TPP60308-ES1R-S −40°C to 125°C ESOP8 638 Level 2 Tape & Reel, 4000 Green TPP60308-ES1R −40°C to 125°C ESOP8 638 Level 2 Tape & Reel, 4000 Green Green: 3PEAK defines "Green" to mean RoHS compatible and free of halogen substances. TPP60308 60-V 3.5-A Step-Down DC/DC Converter www.3peak.com 20 / 22 EA20230203A0

IMPORTANT NOTICE AND DISCLAIMER Copyright© 3PEAK 2012-2023. All rights reserved. Trademarks. Any of the 思瑞浦 or 3PEAK trade names, trademarks, graphic marks, and domain names contained in this document /material are the property of 3PEAK. You may NOT reproduce, modify, publish, transmit or distribute any Trademark without the prior written consent of 3PEAK. Performance Information. Performance tests or performance range contained in this document/material are either results of design simulation or actual tests conducted under designated testing environment. Any variation in testing environment or simulation environment, including but not limited to testing method, testing process or testing temperature, may affect actual performance of the product. Disclaimer. 3PEAK provides technical and reliability data (including data sheets), design resources (including reference designs), application or other design recommendations, networking tools, security information and other resources "As Is". 3PEAK makes no warranty as to the absence of defects, and makes no warranties of any kind, express or implied, including without limitation, implied warranties as to merchantability, fitness for a particular purpose or non-infringement of any third- party’s intellectual property rights. Unless otherwise specified in writing, products supplied by 3PEAK are not designed to be used in any life-threatening scenarios, including critical medical applications, automotive safety-critical systems, aviation, aerospace, or any situations where failure could result in bodily harm, loss of life, or significant property damage. 3PEAK disclaims all liability for any such unauthorized use. TPP60308 60-V 3.5-A Step-Down DC/DC Converter www.3peak.com 21 / 22 EA20230203A0

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