MIC4575 _ BDTIC a Leading Distributor in China

MIC4575

The MIC4575 is a series of easy to use fixed and adjustable BiCMOS step-down (buck) switch-mode voltage regulators. The 200kHz MIC4575 duplicates the pinout and function of the 52kHz LM2575. The higher switching frequency may allow up to a 2:1 reduction in output filter inductor size.

The MIC4575 is available in 3.3V, and 5V fixed output versions or a 1.23V to 20V adjustable output version. Both versions are capable of driving a 1A load with excellent line and load regulation.

The feedback voltage is guaranteed to ±2% tolerance for adjustable versions, and the output voltage is guaranteed to ±3% for fixed versions, within specified voltages and load conditions. The oscillator frequency is guaranteed to ±10%.

In shutdown mode, the regulator draws less than 200µA standby current. The regulator performs cycle-by-cycle current limiting and thermal shutdown for protection under fault conditions.

This series of simple switch-mode regulators requires a minimum number of external components and can operate using a standard series of inductors. Frequency compensation is provided internally.

The MIC4575 is available in TO-220 (T) and TO-263 (U) packages for the industrial temperature range.

Features

Fixed 200kHz operation
3.3V, 5V, and adjustable output versions
Voltage over specified line and load conditions:
Fixed version: ±3% max. output voltage
Adjustable version: ±2% max. feedback voltage
Guaranteed 1A switch current
Wide input voltage range: 4V to 24V
Wide output voltage range: 1.23V to 20V
Requires minimum external components
< 200µA typical shutdown mode
75% efficiency (adjustable version > 75% typical)
Standard inductors and capacitors are 25% of typical LM2575 values.
Thermal shutdown
Overcurrent protection
100% electrical thermal limit burn-in

Parameter

Parameter Name Value	Value
Regulator Type Step Down (Buck)	Step Down (Buck)
# of Outputs 1	1
Input Voltage Range Min (V) 4	4
Input Voltage Range Max (V) 24	24
Output Voltage Range Min (V) 1.23	1.23
Output Current (A) max 1	1
Quiescent Current (mA) typ 5	5
Switching Frequency (kHz) 200	200
Operating Temp Range -40 to 85	-40 to 85
Vfb (V) 1.23	1.23
Duty Cycle Max (%) 0.95	0.95
SHUTDOWN Current (µA) (Typ) 50	50

Documents

MIC4575 Data Sheet	Data Sheets	11/05/2015	525KB
Micrel AN 2 - 200kHz MIC4574/5/6 Family Design Guide	AppNote	09/29/2015	36KB
Micrel AN 83 - Practical Switching Regulator Circuits	AppNote	10/02/2015	442KB
MIC4575 Evaluation Board	User Guides	11/11/2015	45KB

Ordering Information

Part Number	Leads	Package Type	Temp Range	Packing	1+	26+	100+	1000+	5000+
MIC4575-5.0WT	5	TO-220	-40C to +85C	TUBE	2.88	2.40	2.18	1.82	1.68
MIC4575-5.0WU	5	DDPAK	-40C to +85C	TUBE	3.01	2.51	2.28	1.90	1.75
MIC4575WU	5	DDPAK	-40C to +85C	TUBE	**	**	**	**	**
MIC4575WU-TR	5	DDPAK	-40C to +85C	T/R	3.01	2.51	2.28	1.90	1.75

RoHS Information

PartNumber	DeviceWeight	ShippingWeight	LeadCount	PackageType	PackageWidth	SolderComposition	JEDECIndicator
MIC4575-3.3WT	1.983900	3.120000	5	TO-220	-	Matte Tin	e3
MIC4575-5.0WT	1.983900	3.120000	5	TO-220	-	Matte Tin	e3
MIC4575WT	1.983900	3.120000	5	TO-220	-	Matte Tin	e3
MIC4575-3.3WU	1.462500	2.520000	5	DDPAK	-	Matte Tin	e3
MIC4575-3.3WU-TR	1.462500	2.053333	5	DDPAK	-	Matte Tin	e3
MIC4575-5.0WU	1.462500	2.520000	5	DDPAK	-	Matte Tin	e3
MIC4575-5.0WU-TR	1.462500	2.053333	5	DDPAK	-	Matte Tin	e3
MIC4575WU	1.462500	2.520000	5	DDPAK	-	Matte Tin	e3
MIC4575WU-TR	1.462500	2.053333	5	DDPAK	-	Matte Tin	e3