MIC2845A Datasheet, PDF (3/18 Pages) Micrel Semiconductor – High Efficiency 6 Channel Linear WLED Driver with DAM™, Ultra Fast PWM™ Control and Dual Low IQ LDOs

Micrel Inc.
MIC2845A
Ordering Information
Part Number
MIC2845A-MFYMT
MIC2845A-MGYMT
MIC2845A-PGYMT
MIC2845A-PPYMT
MIC2845A-SCYMT
Mark Code⁽¹⁾
YNMF
YNMG
YNPG
YNPP
YNSC
LDO1
VOUT
2.8V
2.8V
3.0V
3.0V
3.3V
LDO2
VOUT
1.5V
1.8V
1.8V
3.0V
1.0V
Temperature Range
Package⁽²⁾
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
14-Pin 2.5mm x 2.5mm Thin MLF^®
14-Pin 2.5mm x 2.5mm Thin MLF^®
14-Pin 2.5mm x 2.5mm Thin MLF^®
14-Pin 2.5mm x 2.5mm Thin MLF^®
14-Pin 2.5mm x 2.5mm Thin MLF^®
Notes:
1. Thin MLF^® ▲ = Pin 1 identifier.
2. Thin MLF^® is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is halogen free.
3. Contact Micrel for other voltage options.
Pin Configuration
VIN
LDO2
EN2
EPAD
D4
GND
D3
Pin Description
Pin Number
1
2
3
4
Pin Name
VIN
LDO2
EN2
END
5
RSET
6
7
8
9
10
11
12
13
14
EPAD
D1
D2
D3
GND
D4
D5
D6
EN1
LDO1
HS PAD
14-Pin 2.5mm x 2.5mm Thin MLF^® (MT)
(Top View)
Pin Function
Voltage Input. Connect at least 1µF ceramic capacitor between VIN and GND.
Output of LDO2. Connect at least 1µF ceramic output capacitor.
Enable Input for LDO2. Active High Input. Logic High = On; Logic Low = Off; Do not leave floating.
Enable for LED driver. Can be used as a PWM input for dimming of LEDs. Do not leave floating.
An internal 1.27V reference sets the nominal maximum LED current. Example, apply a 20.5kΩ
resistor between RSET and GND to set LED current to 20mA at 100% duty cycle.
LED1 driver. Connect LED anode to VIN and cathode to this pin.
LED2 driver. Connect LED anode to VIN and cathode to this pin.
LED3 driver. Connect LED anode to VIN and cathode to this pin.
Ground.
LED4 driver. Connect LED anode to VIN and cathode to this pin.
LED5 driver. Connect LED anode to VIN and cathode to this pin.
LED6 driver. Connect LED anode to VIN and cathode to this pin.
Enable Input for LDO1. Active High Input. Logic High = On; Logic Low = Off; Do not leave floating.
Output of LDO1. Connect at least 1µF ceramic output capacitor.
Heat sink pad. Not internally connected. Connect to ground.
April 2010
3
M9999-041210-C