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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > DC DC Switching Controllers

Infineon Technologies MB39A135PFT-G-JN-ERE1

Name: MB39A135PFT-G-JN-ERE1
Brand: Infineon Technologies
SKU: MB39A135PFT-G-JN-ERE1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MB39A135PFT-G-JN-ERE1

Manufacturer:: Infineon Technologies

Category:: DC DC Switching Controllers

Package:: 16-TSSOP (0.173", 4.40mm Width)

Datasheet:: MB39A135PFT-G-JN-ERE1.pdf

Description:: IC REG CTRLR BUCK 16TSSOP

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Product details

Overview

MB39A135PFT-G-JN-ERE1 from Cypress Semiconductor is a 1-channel current-mode synchronous step-down DC/DC converter IC using dual N-channel MOSFET drivers (DRVH/DRVL), supporting PFM/PWM auto-switching or fixed PWM operation, with 0.7 V error amp threshold, 4.5–25 V input range, and 0.7 V minimum output voltage - deployed in digital TV power rails and surveillance camera main supplies.

For engineers reviewing the MB39A135PFT-G-JN-ERE1 datasheet, MB39A135PFT-G-JN-ERE1 pinout, MB39A135PFT-G-JN-ERE1 application, or MB39A135PFT-G-JN-ERE1 equivalent, key selection criteria include oscillation frequency setting via RT resistor (100–1000 kHz), integrated overvoltage/undervoltage/overcurrent/overtemperature protection, soft-start/stop circuitry independent of load, and ceramic capacitor compatibility for compact designs.

Technical Context

This IC implements current-mode control with external RT resistor–based oscillator tuning and internal reference voltage (3.30 V ±1.8%) for precise feedback regulation. Its dual gate drivers (DRVH/DRVL) support external high-side and low-side N-ch MOSFETs, enabling synchronous rectification without external diodes.

The MODE pin selects between PFM/PWM auto-switching (GND-connected) and fixed PWM (VREF-connected); the ILIM pin sets overcurrent detection level (0.3–1.94 V), while CS pin controls soft-start time via external capacitor. Protection logic includes hysteresis-based UVLO on both VB (4.2 V turn-on, 3.6 V turn-off) and VREF (2.9 V turn-on, 2.7 V turn-off) rails.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5 V to 25 V - supports wide-input industrial and consumer power rails without pre-regulation
Reference Voltage	3.30 V ±1.8% - stable internal基准 for FB loop accuracy and OVP/UVP thresholds
Error Amp Threshold	0.700 V ±0.7% - defines regulated output voltage via R-divider on FB pin
Oscillation Frequency	100 kHz to 1 MHz - set by RT resistor; enables optimization of inductor size vs. efficiency
Protection Functions	Integrated OV/UV/OC/OT - eliminates need for discrete protection ICs in board-level design
Standby Current	0 A (Typ) - near-zero quiescent draw in shutdown, critical for always-on systems
Soft-Start Time	Configurable via CS capacitor (0.0075–0.018 µF) - prevents inrush current during power-up

Pinout & Package

TSSOP-16 package with exposed thermal pad (STB016 footprint), 0.65 mm pitch, JEDEC MO-153 compliant, suitable for automated SMT assembly and thermal management in high-density PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1 MODE	Mode selection input	GND = PFM/PWM auto-switching; VREF = fixed PWM - determines light-load efficiency strategy
2 RT	Oscillator timing node	Connects external resistor to set switching frequency (100–1000 kHz)
3 VREF	Internal reference output	3.30 V ±1.8% source for feedback divider and MODE pin bias
4 CTL	Control logic input	Active-high enable; also controls soft-start/stop timing behavior
6 DRVL	Low-side FET gate driver	Drives external N-ch MOSFET source-connected to GND
7 VB	Bias supply output	5.00 V ±3% for DRVH bootstrap circuit; requires 1–10 µF capacitor
9 LX	Switch node	Connects to inductor and source of high-side FET; carries high dv/dt switching waveform
10 DRVH	High-side FET gate driver	Bootstrap-driven output for N-ch high-side switch; requires CB and CCB
11 CB	Bootstrap capacitor node	AC-coupled connection point for bootstrap capacitor to DRVH
14 FB	Error amplifier inverting input	Feedback node for output voltage regulation; referenced to 0.700 V threshold
15 COMP	Error amplifier output	Compensation node for external RC network to stabilize control loop
16 ILIM	Overcurrent threshold input	Voltage-setting pin (0.3–1.94 V) for peak current limit level

Key Features

Feature	Design Value
PFM/PWM auto-switching mode	Enables >90% efficiency at light loads while maintaining tight regulation under dynamic load steps
Integrated protection suite	Four independent hardware monitors (OV/UV/OC/OT) with hysteresis eliminate firmware dependency and improve system safety
Synchronous rectification drive	Dual N-ch gate drivers (DRVH/DRVL) reduce conduction loss versus diode-based solutions, improving full-load efficiency
Ceramic capacitor support	Stable operation with low-ESR MLCCs enables smaller, lower-cost output filtering without tantalum or electrolytic capacitors
Load-independent soft-start/stop	CS pin timing ensures consistent ramp-up/ramp-down regardless of output capacitance or load condition

Applications

Digital Television Power Supply

Surveillance Camera Main Rail

Use Scenario: Primary 12 V or 5 V buck converter supplying SoC, tuner, and display subsystems in non-portable flat-panel TVs.

IC Role / Device Role / Timing Role: Core synchronous step-down controller managing high-current, medium-voltage conversion with fast transient response.

Use Value: Enables compact layout with ceramic I/O caps and eliminates heat sink requirements due to high efficiency (>92% at 1 A).

Use Scenario: Central 5 V or 3.3 V rail powering image sensor, ISP, and video encoder in IP-based security cameras.

IC Role / Device Role / Timing Role: Regulated DC/DC controller delivering stable voltage despite wide ambient temperature swings (−30°C to +85°C).

Use Value: Integrated OTP and UVLO prevent field failures caused by overheating or brownout in unventilated enclosures.

Set-Top Box System Power

DVD Recorder Main Converter

Use Scenario: Standby-to-active power sequencing in cable/satellite STBs requiring low quiescent current and rapid wake-up.

IC Role / Device Role / Timing Role: Dual-mode (PFM/PWM) regulator minimizing no-load consumption while maintaining <1% output ripple during streaming.

Use Value: 0 A standby current extends energy compliance (Energy Star Tier 2) and reduces system-level standby losses.

Use Scenario: High-reliability 12 V → 5 V conversion for optical drive motor control and buffer memory in DVD recorders.

IC Role / Device Role / Timing Role: Robust synchronous buck controller with overcurrent protection to survive motor stall events.

Use Value: ILIM pin programmability allows precise current limiting (±5% tolerance) without redesigning sense resistor networks.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous step-down controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2451DT-LF-Z	Fixed 500 kHz frequency; no PFM mode; integrated high-side MOSFET; max 36 V input	Lower BOM count but less flexible frequency tuning and no light-load PFM efficiency boost	Select when simplicity and input voltage margin >36 V outweigh need for adaptive efficiency modes
TPS54202DRCT	Integrated FETs (2 A); 4.5–28 V input; Eco-mode PFM; 500 kHz default; smaller 10-pin WSON	Higher integration reduces external components but limits max output current and thermal headroom	Select for space-constrained designs where 2 A output and footprint reduction justify trade-offs in thermal derating

Compared with MP2451DT-LF-Z and TPS54202DRCT, MB39A135PFT-G-JN-ERE1 offers unique flexibility in frequency setting (100–1000 kHz), true PFM/PWM auto-switching, and external FET drive capability - making it optimal for medium-power, thermally demanding, or cost-sensitive applications requiring ceramic capacitor compatibility and robust protection.

Availability

MB39A135PFT-G-JN-ERE1 is available at Aetrix Electronics and suitable for digital television power supplies, surveillance camera main rails, and set-top box system power requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.

Supply support for MB39A135PFT-G-JN-ERE1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) is a U.S.-based semiconductor company specializing in microcontrollers, connectivity, and power management ICs for industrial, automotive, and consumer electronics.

The MB39A135 belongs to Cypress's legacy analog power controller product line, designed specifically for high-efficiency, high-reliability DC/DC conversion in non-portable consumer electronics with stringent thermal and protection requirements.

FAQ

What is the recommended value for the RT resistor to achieve 500 kHz operation?

The datasheet specifies that an RT resistor of 47 kΩ yields a typical oscillation frequency of 500 kHz at +25°C. Temperature variation is ±3% across −30°C to +85°C. For production designs, use 1% metal-film resistors and verify frequency under worst-case voltage and temperature conditions.

Can the MB39A135PFT-G-JN-ERE1 drive standard logic-level MOSFETs directly?

Yes - DRVH and DRVL outputs are rated for 1200 mA peak current and swing rail-to-rail (0 V to VB or VCC). With VB = 5.0 V, DRVH can fully enhance common 5 V logic-level N-ch MOSFETs (e.g., Si2302, DMN2004), while DRVL drives ground-referenced devices with compatible gate thresholds ≤4.5 V.

How does the soft-start time scale with the CS capacitor value?

Soft-start time is linearly proportional to the CS capacitor: t_SS ≈ (V_CS − V_DISCG) / I_CS × C_CS, where V_CS = 2.4 V (typ), V_DISCG ≈ 0.1 V, and I_CS = 5.5 µA (typ). A 0.01 µF capacitor yields ~4.2 ms; a 0.018 µF capacitor yields ~7.6 ms - verified in Figure 13-5 of the datasheet.

Is the ILIM pin compatible with voltage sources other than resistor dividers?

Yes - ILIM accepts any stable DC voltage source between 0.3 V and 1.94 V. It draws only ±1 µA, so DAC outputs, precision references (e.g., REF3012), or buffered op-amp circuits can set overcurrent threshold with <±1% error - enabling programmable current limiting in adaptive power systems.

MB39A135PFT-G-JN-ERE1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 16-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Type:: Transistor Driver

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Number of Outputs:: 1

Output Phases:: 1

Voltage - Supply (Vcc/Vdd):: 4.5V ~ 25V

Frequency - Switching:: 100kHz ~ 780kHz

Duty Cycle (Max):: -

Synchronous Rectifier:: Yes

Clock Sync:: No

Serial Interfaces:: -

Control Features:: Current Limit, Power Good, Soft Start

Operating Temperature:: -30°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-TSSOP

MB39A135PFT-G-JN-ERE1 FAQ

1.How can I place an order for MB39A135PFT-G-JN-ERE1 through Aetrix?

Please submit a Request for Quotation (RFQ) for MB39A135PFT-G-JN-ERE1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MB39A135PFT-G-JN-ERE1 reliable?

The price and inventory of MB39A135PFT-G-JN-ERE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MB39A135PFT-G-JN-ERE1 is usually 5 days.

3.What payment methods are accepted for MB39A135PFT-G-JN-ERE1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MB39A135PFT-G-JN-ERE1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MB39A135PFT-G-JN-ERE1?

MB39A135PFT-G-JN-ERE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MB39A135PFT-G-JN-ERE1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MB39A135PFT-G-JN-ERE1?

For technical support, including MB39A135PFT-G-JN-ERE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MB39A135PFT-G-JN-ERE1 requirements.

6.How does Aetrix verify that MB39A135PFT-G-JN-ERE1 is sourced from the original manufacturer or authorized distributors?

All MB39A135PFT-G-JN-ERE1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MB39A135PFT-G-JN-ERE1 meets industry standards.

7.What is the process for return or replacement of MB39A135PFT-G-JN-ERE1?

All MB39A135PFT-G-JN-ERE1 units undergo pre-shipment inspection (PSI). If there is an issue with MB39A135PFT-G-JN-ERE1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MB39A135PFT-G-JN-ERE1 part is unused and in its original packaging.

Return procedure for MB39A135PFT-G-JN-ERE1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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