MIC2870 Datasheet, PDF (6/25 Pages) Micrel Semiconductor – 1.5A Synchronous Boost Flash LED Driver with I2C Interface

Micrel, Inc.
MIC2870
Electrical Characteristics⁽⁷⁾ (Continued)
VIN = 3.6V; L = 1μH, COUT = 2.2μF, RFRSET = 10kΩ, RTRSET = 10kΩ, ILED = 100mA; TA = 25°C, bold values indicate −40°C ≤ TJ ≤ 125°C,
unless otherwise noted.
Symbol
Parameter
Condition
Min. Typ. Max. Units
EN / FEN / TEN / FI Control Pins
VEN_ON
EN On Threshold
Boost converter and chip logic ON
1.5
V
VEN_OFF
EN Off Threshold
Boost converter and chip logic ON
0.4
V
VFEN_ON
FEN On Threshold
FLASH ON
1.5
V
VFEN_OFF
FEN Off Threshold
FLASH OFF
0.4
V
VTEN_ON
TEN On Threshold
TORCH ON
1.5
V
VTEN_OFF
TEN Off Threshold
TORCH OFF
0.4
V
VFI_ON
FI On Threshold
FLASH INHIBIT ON
1.5
V
VFI_OFF
FI Off Threshold
FLASH INHIBIT OFF
0.4
V
EN Pin Current
VEN = 5V
2
5
µA
FEN/TEN/FI Pin Current
VFEN = VTEN = VFI = 5V
1
5
µA
tBlank_EN_Off
EN pin should be driven low for more
EN OFF Blanking Time
than this time before the IC enters sleep 0.90 1.10 1.30
s
mode
I²C Interface (SCL / SDA Pins) (Guaranteed by Design)
fSCL
Maximum Operating
Frequency
3.4
MHz
VIL
VIH
RSDA_DN
Low-Level Input Voltage
High-Level Input Voltage
SDA Pulled-Down
Resistance
0.4
V
1.5
V
20
Ω
Additional Protection Features
VTH_LEDOPEN
LED1 / LED2 Open Detect
Threshold
15
25
40
mV
TBLANK_OPEN
Open Detect Blanking Time
65
µs
TRETRY_OPEN
Open Retry Timeout
100
ms
VTH_LEDSHORT
Short Trigger Threshold
VOUT − MAX[VLED1,VLED2], VOUT = 3.6V
400
600
800
mV
VHYST_LEDSHORT Short Trigger Hysteresis
200
mV
TBLANK_SHORT
Short Trigger Blanking
Time
30
µs
TRETRY_ SHORT
Short Retry Timeout
100
ms
September 5, 2013
6
Revision 1.0