A1

A2

B1

B3

Top View

A3

C1

C3

D2

D1

D3

B2

C2

LM3561

SNOSB44C – MARCH 2011 – REVISED MAY 2013

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DESCRIPTION (CONTINUED)

Flash enable input for direct triggering of the Flash pulse, dual TX inputs (TX1 and TX2) which force the Flash

pulse into a low-current Torch mode during high battery current instances, an active high hardware enable

(HWEN) allowing for fast hardware shutdown during system software failures, a dual mode pin which serves as

either an indicator LED driver at up to 18mA or as a dedicated comparator input with an internal 1V reference,

designed to monitor the voltage across a negative temperature coefficient thermistor (NTC), and a programmable

input voltage monitor which monitors IN and can reduce the flash current or shutdown the device during low

battery conditions.

indicating the flash pulse has reached the end of the programmable timeout duration, a thermal shutdown flag

indicating the LM3561's die temperature has exceeded 150°C, an LED fault flag indicating the output voltage has

tripped the over-voltage threshold, or the LED has become shorted, TX1 and TX2 interrupt flags indicating if

either of the TX inputs have been triggered, an NTC flag indicating the LED has experienced an over

temperature condition, and a VIN Monitor flag indicating the input voltage has fallen below the VIN Monitor

threshold.

The LM3561 is available in a tiny (1.215mm × 1.615mm × 0.6mm) 12-bump DSBGA and operates over the

temperature range -40°C to +85°C.

Table 1. Application Circuit Component List

Component

Manufacturer

Value

Part Number

Size (mm)

Rating

L

TDK

1µH

MLP2520-1R0

2x2.5x1.2

1.5A

COUT

Murata

10µF

GRM188R60J106M

1.6×0.8×0.8 (0603)

6.3V

CIN

Murata

10µF

GRM188R60J106M

1.6×0.8×0.8 (0603)

6.3V

LEDs

Lumiled

3.6V@1A

LXCL-PWF4

1.5A

Connection Diagram

Figure 3. DSBGA Package

see package number YFQ0012AAA

2

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