Specification	MIC2291-34YML-TR

Applications	Camera Flash
Current - Output / Channel	1.2 A
Dimming	Analog, PWM
Frequency	1.2 MHz
Internal Switch(s)	True
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Package / Case	8-MLF®, 8-VFDFN Exposed Pad
Supplier Device Package	8-MLF® (2x2)
Topology	Step-Up (Boost)
Type	DC DC Regulator
Voltage - Output	34 V
Voltage - Supply (Max) [Max]	10 V
Voltage - Supply (Min) [Min]	2.5 V

MIC2291 Series

Boost Regulator Photo Flash LED Driver

Part	Type	Current - Output / Channel	Voltage - Supply (Min) [Min]	Package / Case	Operating Temperature [Min]	Operating Temperature [Max]	Applications	Voltage - Supply (Max) [Max]	Voltage - Output	Topology	Frequency	Number of Outputs	Mounting Type	Dimming	Supplier Device Package
Microchip Technology MIC2291-34YML-TR	DC DC Regulator	1.2 A	2.5 V	8-MLF® 8-VFDFN Exposed Pad	-40 °C	125 ¯C	Camera Flash	10 V	34 V	Step-Up (Boost)	1.2 MHz	1	Surface Mount	Analog PWM	8-MLF® (2x2)
Microchip Technology MIC2291-15BML-TR	DC DC Regulator	1.2 A	2.5 V	8-MLF® 8-VFDFN Exposed Pad	-40 °C	125 ¯C	Camera Flash	10 V	16 V	Step-Up (Boost)	1.2 MHz	1	Surface Mount	Analog PWM	8-MLF® (2x2)
Microchip Technology MIC2291YD5-TR	DC DC Regulator	1.2 A	2.5 V	SOT-23-5 Thin TSOT-23-5	-40 °C	125 ¯C	Camera Flash	10 V		Step-Up (Boost)	1.2 MHz	1	Surface Mount	Analog PWM
Microchip Technology MIC2291BD5-TR	DC DC Regulator	1.2 A	2.5 V	SOT-23-5 Thin TSOT-23-5	-40 °C	125 ¯C	Camera Flash	10 V		Step-Up (Boost)	1.2 MHz	1	Surface Mount	Analog PWM

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 1.82
		25	$ 1.52
		100	$ 1.45
	Digi-Reel®	1	$ 1.82
		25	$ 1.52
		100	$ 1.45
	Tape & Reel (TR)	5000	$ 1.45
Microchip Direct	T/R	1	$ 1.82
		25	$ 1.52
		100	$ 1.37
		1000	$ 1.34
		5000	$ 1.32
Newark	Each (Supplied on Full Reel)	100	$ 1.42

Description

General part information

MIC2291 Series

The MIC2291 is a 1.2MHz pulse-width modulation (PWM), boost-switching regulator that is optimized for high-current, white LED photo flash applications. With a guaranteed switch current of 1.2A, the MIC2291 easily drives a string of three white LEDs in series at 100mA, ensuring a high level of brightness and eliminating several ballast resistors.

The MIC2291 implements a constant frequency, 1.2MHz PWM control scheme. The high frequency PWM operation saves board space by reducing external component sizes. The added benefit of the constant frequency PWM scheme, in contrast to variable frequency topologies, is much lower noise and input ripple injected back to the battery source.

To optimize efficiency, the feedback voltage is set to only 95mV. This reduces the power dissipation in the current set resistor, and allows the lowest total output voltage, hence minimal current draw from the battery.