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LM5168PQDDARQ1

更新时间： 2022-06-24 15:39:36
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德州仪器 - TI /
页数 文件大小 规格书
33页 2421K
描述
LM5169-Q1/LM5168-Q1 0.65-A/0.3-A, 120-V, Step-Down Converter with Fly-Buck™ Converter Capability

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LM5168PQDDARQ1 数据手册

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LM5168-Q1, LM5169-Q1  
SNVSBZ3 – JUNE 2021  
LM5169-Q1/LM5168-Q1 0.65-A/0.3-A, 120-V, Step-Down Converter with Fly-Buck™  
Converter Capability  
1 Features  
3 Description  
•
AEC-Q100-qualified for automotive applications  
– Device temperature grade 1: –40°C to +125°C,  
ambient temperature range  
The LM5169-Q1 and LM5168-Q1 synchronous buck  
converters are designed to regulate over a wide input  
voltage range, minimizing the need for external surge  
suppression components. A minimum controllable on  
time of 50 ns facilitates large step-down conversion  
ratios, enabling the direct step-down from a 48-  
V nominal input to low-voltage rails for reduced  
system complexity and solution cost. The LM5169-Q1  
operates during input voltage dips as low as 6 V,  
at nearly 100% duty cycle if needed, making it an  
excellent choice for wide input supply range industrial  
and high cell count battery pack applications.  
•
Designed for reliable and rugged applications  
– Wide input voltage range of 6 V to 120 V  
– Junction temperature range: –40°C to +150°C  
– Fixed 3-ms internal soft-start timer  
– Peak and valley current-limit protection  
– Input UVLO and thermal shutdown protection  
Suited for scalable automotive HEV/EV power  
supplies  
– Low minimum on and off times of 50 ns  
– Adjustable switching frequency up to 1 MHz  
– Diode emulation for high light-load efficiency  
– Auto mode with low-quiescent current (< 10 µA)  
– FPWM mode enables fly-buck capability  
– 3-µA shutdown quiescent current  
•
With integrated high-side and low-side power  
MOSFETs, the LM5169-Q1 delivers up to 0.65-A  
of output current and the LM5168-Q1 delivers up  
to 0.3-A of output current. A constant on time  
(COT) control architecture provides nearly constant  
switching frequency with excellent load and line  
transient response. The LM5169-Q1 is available in  
FPWM or Auto mode operation. FPWM mode ensures  
forced CCM operation across the entire load range  
supporting isolated Fly-buck operation. Auto mode  
enables ultra-low IQ and diode emulation mode  
operation for high light-load efficiency.  
– Pin-to-pin compatible with LM5164-Q1,  
LM5163-Q1, LM5017, and LM34927  
Integration reduces solution size and cost  
•
– COT mode control architecture  
– Integrated 1.9-Ω NFET buck switch  
– Integrated 0.71-Ω NFET synchronous rectifier  
– 1.2-V internal voltage reference  
– No loop compensation components  
– Internal VCC bias regulator and boot diode  
– Open-drain power-good indicator  
– 8-pin SOIC package with PowerPAD™ with  
30°C/W RθJA (EVM)  
Device Information  
PART NUMBER  
LM5169-Q1  
PACKAGE(1)  
BODY SIZE (NOM)  
SO PowerPAD (8)  
4.89 mm × 3.90 mm  
LM5168-Q1  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
2 Applications  
•
•
•
•
Communications – brick power module  
Industrial battery pack (≥ 10 S)  
Battery pack – e-bike/e-scooter/LEV  
HEV/EV – battery management system  
D1  
LO  
VIN  
VOUT  
VOUT2  
VIN  
SW  
COUT2  
CA  
RA  
CBST  
CIN  
RFB1  
T1  
EN/UVLO  
RT  
BST  
FB  
VIN  
VOUT1  
COUT  
VIN  
SW  
CB  
CA  
RA  
CBST  
CIN  
RFB1  
EN/UVLO  
RT  
BST  
FB  
RT  
RFB2  
COUT1  
CB  
PGOOD  
GND  
RT  
RFB2  
GND  
PGOOD  
Typical Buck Application Circuit  
Typical Fly-Buck Application Circuit  
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. ADVANCE INFORMATION for preproduction products; subject to change  
without notice.  
 
 
 
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