MIC28511 _ BDTIC a Leading Distributor in China

MIC28511

The MIC28511 is a synchronous step-down switching regulator with internal power switches capable of providing up to 3A output current from a wide input supply range from 4.6V to 60V. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%. A constant switching frequency can be programmed from 200kHz to 680kHz. The Hyper Speed Control™ and HyperLight Load^® architectures of the MIC28511 allow for high V_IN (low V_OUT) operation and ultra-fast transient response while reducing the required output capacitance and providing very good light load efficiency.

The MIC28511 offers a full suite of protection features to ensure protections under fault conditions. These include under-voltage lockout to ensure proper operation under power sag conditions, internal soft-start to reduce inrush current, fold-back current limit, â€œhiccupâ€ mode short-circuit protection, and thermal shutdown.

Features

4.6V to 60V operating input voltage supply
Up to 3A output current
Integrated high-side and low-side N-channel MOSFETs
HyperLight Load® (MIC28511-1) and Hyper Speed Control™ (MIC28511-2) architecture
Enable input and power good (PGOOD) output
Programmable current limit and foldback "hiccup" mode short-circuit protection
Built-in 5V regulator for single-supply operation
Adjustable 200kHz to 680kHz switching frequency
Fixed 5ms soft-start
Internal compensation and thermal shutdown
Thermally enhanced 24-pin 3mm — 4mm FCQFN package
Junction temperature range of -40°C to +125°C

Parameter

Parameter Name Value	Value
Regulator Type Step Down (Buck)	Step Down (Buck)
# of Outputs 1	1
Input Voltage Range Min (V) 4.6	4.6
Input Voltage Range Max (V) 60	60
Output Voltage Range Min (V) 0.8	0.8
Output Voltage Range Max (V) 24	24
Output Current (A) max 3	3
Quiescent Current (mA) typ 0.4	0.4
Synchronous Rectifier Yes	Yes
Operating Temp Range -40 to 125	-40 to 125
Vfb (V) 0.8	0.8
Duty Cycle Max (%) 0.85	0.85
SHUTDOWN Current (µA) (Typ) 0.1	0.1
Light Load Efficiency Mode Yes	Yes

Documents

MIC28511 - 60 VIN, 3A Synchronous Buck Regulator	Data Sheets	05/04/2016	2739KB
Micrel AN 87 - Putting Adaptive Constant-ON-Time Buck ICs and Modules to Work in Inverting Buck-Boost Converters	AppNote	10/02/2015	509KB
Micrel ANLPS207 - Putting Adaptive Constant-On-Time Buck ICs and Modules to Work in Inverting Buck-Boost Converters	AppNote	11/16/2015	509KB

Ordering Information

Part Number	Leads	Package Type	Temp Range	Packing	1+	26+	100+	1000+	5000+
MIC28511-1YFL-T5	24	VQFN	-40C to +125C	T/R	2.16	1.80	1.64	1.58	1.56
MIC28511-1YFL-TR	24	VQFN	-40C to +125C	T/R	2.16	1.80	1.64	1.58	1.56
MIC28511-2YFL-T5	24	VQFN	-40C to +125C	T/R	2.16	1.80	1.64	1.58	1.56
MIC28511-2YFL-TR	24	VQFN	-40C to +125C	T/R	2.16	1.80	1.64	1.58	1.56

RoHS Information

PartNumber	ShippingWeight	LeadCount	PackageType	PackageWidth	SolderComposition	JEDECIndicator
MIC28511-2YFL-T5	0.804900	24	VQFN	3x4x0.9mm	NiPdAu	e4
MIC28511-2YFL-TR	0.804900	24	VQFN	3x4x0.9mm	NiPdAu	e4
MIC28511-1YFL-T5	0.804900	24	VQFN	3x4x0.9mm	NiPdAu	e4
MIC28511-1YFL-TR	0.804900	24	VQFN	3x4x0.9mm	NiPdAu	e4