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SA23004XHQ

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5.5V, 4A Single Synchronous Buck Converter
Datasheet
SA23004XHQ 5.5V, 4A Single Synchronous Buck Converter Datasheet
Part number SA23004XHQ
Channel(#) 1
Vin (min) (V) 2.8
Vin (max) (V) 5.5
Switching frequency (min)(kHz) 1800
Switching frequency (max)(kHz) 3000
Vout (min) (V) 0.6
Vout (max) (V) 5.5
Iout (max) (A) 4
Vout2 (min)(V)
Vout2 (max )(V)
Iout2 (max)(A)
Vref accuracy (±%) 1.2
Vout accuracy(±%)
Control mode Peak current control
Duty cycle (max)(%) 100
Operation mode PFM/FCCM
Iq (typ) (uA) 36
Features Enable,Power good,Auto-discharge,Adjustable soft-start,Low Iq,Wettable flanks package,UVP with hiccup,100% duty cycle,Low ISD,Adjustable switching frequency,Spread spectrum,Cycle by cycle overcurrent protection,Forced PWM,Frequency synchronization,Pre-bias startup
Package QFN2×3-9
Operating temperature range(°C) -40 to 125
Functional safety category Capable
• 2.8V to 5.5V Input Voltage Range
• Up to 4A Output Current
• External Adjustable Output Voltage with ±1.2% Reference Voltage Accuracy
• 1μA Shutdown Current (Typical)
• 36 µA Quiescent Current (Typical)
• Adjustable Switching Frequency of 1.8MHz to 3MHz
• PWM or PFM Operation Selectable in Light Load
• Adjustable Soft-Start Time
• 100% Duty-Cycle for Lowest Dropout
• Optional Frequency Spread Spectrum
• Cycle-by-Cycle Current Limit Protection
• Hiccup Mode Short-Circuit Protection
• Power Good Indicator
• Thermal Shutdown
• Compact QFN2×3-9 Package
• Automotive AEC-Q100 Grade 1 Certified
The SA23004 synchronous buck converter has integrated power MOSFETs, an input voltage range of 2.8V to 5.5V, a configurable output voltage from 0.6V to VIN, and a maximum load current capability of 4A. Under light load conditions, it can operate in either pulse width modulation (PWM) mode or pulse frequency modulation (PFM) mode. The soft-start time and 1.8MHz-3MHz switching frequency can be adjusted using external components. 
The SS/TR pin can be used to control the soft start time or as an input for tracking and sequencing, which allows the output voltage to follow the voltage applied at TR in both directions (up and down) in forced PWM mode.
When required by the application, if an external clock frequency is applied on the MODE_SYNC pin, the switching frequency will be synchronized to the external clock frequency and the device will operate in forced PWM mode.
The SA23004 also provides power good indication, undervoltage lockout (UVLO), short-circuit protection, cycle-by-cycle current limit protection, and thermal shutdown.
The SA23004 is available in a QFN 2mm×3mm-9 pin package.

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