L6728H STMicroelectronics, L6728H Datasheet - Page 9
![Voltage Mode PWM Controllers Sgl Output 300 KHz DFN-10](/photos/36/39/363959/dfn-10_sml.jpg)
L6728H
Manufacturer Part Number
L6728H
Description
Voltage Mode PWM Controllers Sgl Output 300 KHz DFN-10
Manufacturer
STMicroelectronics
Datasheet
1.L6728H.pdf
(32 pages)
Specifications of L6728H
Number Of Outputs
Single Output
Switching Frequency
300 KHz
Operating Supply Voltage
5 V to 12 V
Supply Current
6 mA
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Package / Case
DFN-10
Mounting Style
SMD/SMT
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
L6728H
5
Device description
L6728H is a single-phase PWM controller with embedded high-current drivers that provides
complete control logic and protections to realize in an easy and simple way a general DC-
DC step-down converter. Designed to drive N-channel MOSFETs in a synchronous buck
topology, with its high level of integration this 10-pin device allows reducing cost and size of
the power supply solution also providing real-time PGOOD in a compact DFN10 3x3 mm.
L6728H is designed to operate from a 5 V or 12 V supply. The output voltage can be
precisely regulated to as low as 0.8 V with ±0.8% accuracy over line and temperature
variations. The switching frequency is internally set to 300 kHz.
This device provides a simple control loop with a voltage-mode error-amplifier. The error-
amplifier features a 15 MHz gain-bandwidth product and 8V/µs slew rate, allowing high
regulator bandwidth for fast transient response.
To avoid load damages, L6728H provides over current protection as well as over voltage,
under voltage and feedback disconnection protection. The over current trip threshold is
programmable by a simple resistor connected from Lgate to GND. Output current is
monitored across low-side MOSFET R
consuming sense resistor. Output voltage is monitored through dedicated VSEN pin.
L6728H implements soft-start increasing the internal reference in closed loop regulation.
Low-side-less feature allows the device to perform soft-start over pre-biased output avoiding
high current return through the output inductor and dangerous negative spike at the load
side.
L6728H is available in a compact DFN10 3x3 mm package with exposed pad.
Doc ID 15725 Rev 1
DS(on)
, saving the use of expensive and space-
Device description
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