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Versatile Automotive 60V/70V 2.2MHz Buck Controller with 7µA IQ and Optional Bypass Mode

業界最低60V/70V IQの車載同期整流ステップダウンコントローラ、わずか7µAの自己消費電流

製品の詳細

The MAX25206/MAX25207/MAX25208 are automotive 2.2MHz synchronous step-down controller IC with 7µA IQ. This IC operates with an input-voltage supply from 3.5V to 60V (MAX25206/7) and 70V (MAX25208). They can operate in dropout condition by running at 99% (typ) duty cycle. These controllers are intended for applications with mid- to high-power requirements that operate at a wide input voltage range such as during automotive cold-crank or engine stop-start conditions. The MAX25207 has an optional bypass mode which allows 100% high-side switch on until step-down function is needed during automotive transients.

The MAX25206/MAX25207/MAX25208 step-down controllers operate at up to 2.2MHz frequency to allow small external components, reduced output ripple, and to guarantee no AM band interference. The switching frequency is resistor adjustable (220 kHz to 2200 kHz). SYNC input programmability enables three frequency modes for optimized performance: forced fixed-frequency operation, skip mode with ultra-low quiescent current, and synchronization to an external clock. The IC also provides SYNCOUT output to enable two controllers to operate in parallel. The MAX25206/MAX25207/MAX25208 have a pin selectable spread-spectrum option for frequency modulation to minimize EMI interference.

The MAX25206/MAX25207/MAX25208 feature a PGOOD monitor and undervoltage lockout. Protection features include cycle-by-cycle current limit and thermal shutdown. These controllers are specified for operation over the -40°C to +125°C automotive temperature range.

主な機能

  • Meets Stringent OEM Module Power Consumption and Performance Specifications
    • 7µA Quiescent Current in Skip Mode at VOUT = 3.3V
    • ±1.5% Output-Voltage Accuracy: 5.0V/3.3V Fixed, or Adjustable Between 1V and 10V
  • Enables Crank-Ready Designs
    • Wide Input Supply Range from 3.5V to 42V
  • EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input Voltage Range
    • 50ns (typ) Minimum On-Time Guarantees Skip-Free Operation for 3.3V Output from Car Battery at 2.2MHz
    • Spread-Spectrum Option
    • Frequency-Synchronization Input
    • Resistor-Programmable Frequency Between 220kHz and 2.2MHz
  • Integration and Thermally Enhanced Packages Save Board Space and Cost
    • 2.2MHz Step-Down Controller
    • 180° Out-of-Phase SYNCOUT Output for Synchronization
    • Current-Mode Controller with Forced-Continuous and Skip Modes
    • Thermally Enhanced 20-Pin Side-Wettable (SW) TQFN-EP Package
  • Protection Features Improve System Reliability
    • Supply Undervoltage Lockout
    • Overtemperature and Short-Circuit Protection
    • Output Overvoltage and Undervoltage Monitoring
    • -40°C to +125°C Grade 1 Automotive Temperature Range

アプリケーション/用途

  • 24Vトラックシステム、インフォテインメントシステム、48Vシステム
Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3.5
VIN (V) (max) 75
VOUT1 (V) (min) 0.7
VOUT1 (V) (max) 20
IOUT1 (A) (max) 22
Switch Type External
Preset VOUT (V) 5
Output Adjust. Method Preset or Adj
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (typ) .007
# DC-DC Outputs 1
Switching Frequency (kHz) 2200
Design Tools EE-Sim
Package/Pins TQFN-CU/20
Budgetary
Price (See Notes)
$2.35 @1k
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技術資料

設計と開発

以下タイトルをクリックして詳細をご覧ください。

説明

The MAX25207 evaluation kit (EV kit) provides a proven design to evaluate the MAX25207 automotive 2.2MHz synchronous step-down controllers with bypass mode. The default EV kit delivers 7A with input voltages up to 60V, but it can be configured to deliver up to 20A. The output voltage quality can be monitored by observing the PGOOD signal.

詳細を見る

特長

  • +3.5V to +60V Input Supply Range
  • Output Voltage: 14V in Buck Mode (Follows Input in Bypass Mode)
  • Output Current: 7A (Configurable to 20A)
  • Switching Frequency: 440kHz
  • Forced-PWM Mode of Operation
  • Spread-Spectrum Control
  • Enable Input
  • Voltage Monitoring PGOOD Output
  • Proven PCB Layout
  • Fully Assembled and Tested

説明

The MAX25206 evaluation kit (EV kit) provides a proven design to evaluate the MAX25206/8 automotive 2.2MHz synchronous step-down controllers with 7µA IQ. The EV kit PCB comes with a MAX25206 IC installed, as well as various test points and jumpers for evaluation. The EV kit output voltage is fixed and is easily configured with minimum component changes. The default EV kit is designed to deliver up to 7A with input voltages from +3.5V to +60V (MAX25206) and +70V (MAX25208), but can be configured to deliver up to 20A. Output voltage quality can be monitored by observing the PGOOD signal.

詳細を見る

特長

  • +3.5V to +60V (MAX25206) and +70V (MAX25208) Input Supply Range
  • Output Voltage: 5V or 3.3V Fixed or Adjustable between 0.7V to 20V
  • Delivers up to 20A Output Current
  • Frequency Synchronization Input
  • Frequency Synchronization Output
  • Spread-Spectrum Control
  • Enable Input
  • Voltage-Monitoring PGOOD Output
  • Proven PCB Layout
  • Fully Assembled and Tested

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ツールおよびモデル

EE-Sim: 設計およびシミュレーションMAX25208

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サポートとトレーニング

ナレッジベースを検索して技術質問への回答を探す。

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パラメーター

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3.5
VIN (V) (max) 75
VOUT1 (V) (min) 0.7
VOUT1 (V) (max) 20
IOUT1 (A) (max) 22
Switch Type External
Preset VOUT (V) 5
Output Adjust. Method Preset or Adj
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (typ) .007
# DC-DC Outputs 1
Switching Frequency (kHz) 2200
Design Tools EE-Sim
Package/Pins TQFN-CU/20
Budgetary
Price (See Notes)
$2.35 @1k

主な機能

  • Meets Stringent OEM Module Power Consumption and Performance Specifications
    • 7µA Quiescent Current in Skip Mode at VOUT = 3.3V
    • ±1.5% Output-Voltage Accuracy: 5.0V/3.3V Fixed, or Adjustable Between 1V and 10V
  • Enables Crank-Ready Designs
    • Wide Input Supply Range from 3.5V to 42V
  • EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input Voltage Range
    • 50ns (typ) Minimum On-Time Guarantees Skip-Free Operation for 3.3V Output from Car Battery at 2.2MHz
    • Spread-Spectrum Option
    • Frequency-Synchronization Input
    • Resistor-Programmable Frequency Between 220kHz and 2.2MHz
  • Integration and Thermally Enhanced Packages Save Board Space and Cost
    • 2.2MHz Step-Down Controller
    • 180° Out-of-Phase SYNCOUT Output for Synchronization
    • Current-Mode Controller with Forced-Continuous and Skip Modes
    • Thermally Enhanced 20-Pin Side-Wettable (SW) TQFN-EP Package
  • Protection Features Improve System Reliability
    • Supply Undervoltage Lockout
    • Overtemperature and Short-Circuit Protection
    • Output Overvoltage and Undervoltage Monitoring
    • -40°C to +125°C Grade 1 Automotive Temperature Range

アプリケーション/用途

  • 24Vトラックシステム、インフォテインメントシステム、48Vシステム

説明

The MAX25206/MAX25207/MAX25208 are automotive 2.2MHz synchronous step-down controller IC with 7µA IQ. This IC operates with an input-voltage supply from 3.5V to 60V (MAX25206/7) and 70V (MAX25208). They can operate in dropout condition by running at 99% (typ) duty cycle. These controllers are intended for applications with mid- to high-power requirements that operate at a wide input voltage range such as during automotive cold-crank or engine stop-start conditions. The MAX25207 has an optional bypass mode which allows 100% high-side switch on until step-down function is needed during automotive transients.

The MAX25206/MAX25207/MAX25208 step-down controllers operate at up to 2.2MHz frequency to allow small external components, reduced output ripple, and to guarantee no AM band interference. The switching frequency is resistor adjustable (220 kHz to 2200 kHz). SYNC input programmability enables three frequency modes for optimized performance: forced fixed-frequency operation, skip mode with ultra-low quiescent current, and synchronization to an external clock. The IC also provides SYNCOUT output to enable two controllers to operate in parallel. The MAX25206/MAX25207/MAX25208 have a pin selectable spread-spectrum option for frequency modulation to minimize EMI interference.

The MAX25206/MAX25207/MAX25208 feature a PGOOD monitor and undervoltage lockout. Protection features include cycle-by-cycle current limit and thermal shutdown. These controllers are specified for operation over the -40°C to +125°C automotive temperature range.

技術資料

サポートとトレーニング

ナレッジベースを検索して技術質問への回答を探す。

絞り込まれた検索

マキシムでは、お客様の技術的質問にお答えするため、アプリケーションエンジニアの専任チームも配置しています。 サポートセンター をご覧ください。