Datasheet Linear Technology LT8643S

Manufacturer	Linear Technology
Series	LT8643S

42V, 6A Synchronous Step-Down Silent Switcher 2 with 2.5µA Quiescent Current

Datasheets

PDF, 2.3 Mb, Language: en, File uploaded: Sep 20, 2017, Pages: 30
42V, 6A Synchronous Step-Down Silent Switcher 2 with 2.5µA Quiescent Current

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	LT8643SEV#PBF	LT8643SIV#PBF
N	1	2
Package	4mm × 4mm × 0.94mm LQFN Package Outline Drawing	4mm × 4mm × 0.94mm LQFN Package Outline Drawing
Package Code	LQFN	LQFN
Package Index	05-08-1511	05-08-1511
Pin Count	24	24

Parameters / Models	LT8643SEV#PBF	LT8643SIV#PBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC2658A	DC2658A
Design Tools	LTspice Model,LTpowerCAD File	LTspice Model,LTpowerCAD File
Export Control	no	no
Features	Low EMI, Silent Switcher 2 Architecture, Internal Bypass Caps, Resistor Set Frequency, External Synchronization, Burst Mode, Tracking, Power Good	Low EMI, Silent Switcher 2 Architecture, Internal Bypass Caps, Resistor Set Frequency, External Synchronization, Burst Mode, Tracking, Power Good
Frequency, kHz	3000	3000
Frequency Adjust Range	200kHz - 3MHz	200kHz - 3MHz
Frequency Sync Range	200kHz - 3MHz	200kHz - 3MHz
Integrated Inductor	no	no
Ishutdown, µA	1.7	1.7
Isupply, mA	0.021	0.021
Max Phases	1	1
Monolithic	yes	yes
Number of Outputs	1	1
Operating Temperature Range, °C	0 to 85	-40 to 85
Output Current, A	6	6
Polyphase	no	no
Switch Current, A	10	10
Synchronous	yes	yes
Topology	Buck	Buck
Topology 1	Buck	Buck
Vin Max, V	42	42
Vin Min, V	3.4	3.4
Vin Min Startup, V	3.4	3.4
Vout Max, V	41.58	41.58
Vout Maximum	0.99Vin	0.99Vin
Vout Min, V	0.97	0.97
Vref Accuracy Over Temp, %	1.23	1.23

	LT8643SEV#PBF	LT8643SIV#PBF
RoHS	Compliant	Compliant

Series: LT8643S (2)

Power Management > Switching Regulator > Ultralow Noise Regulators
Power Management > Switching Regulator > Step-Down (Buck) Regulators > Micropower Buck Regulators | Internal Power Switch Buck | High Input Voltage Buck