MIC2870 Datasheet, PDF (5/25 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
FSW
RON(N)
RON(P)
ILK(N)
ILK(P)
Oscillator Frequency
Switch On-Resistance
NMOS Switch Leakage
Current
PMOS Switch Leakage
Current
VVIN = 2.7 V, ISW = 750 mA
VSW = 2.7 V, IOUT = 750 mA
VEN = 0 V, VIN = Vsw = VOUT = 5 V
VEN = 0 V, VIN = VOUT = 5 V, Vsw = 0 V
1.8
2.0
2.2
MHz
80
mΩ
80
1
5
µA
1
5
µA
RDCHG
Auto-Discharge NMOS
Resistance
VEN = 0 V, IOUT = −1 mA
160
Ω
TSD
Overtemperature Shutdown
Threshold
160
°C
TSD_HYST
Overtemperature Shutdown
Hysteresis
25
°C
TFLASH_TIMEOUT
Flash Safety Timeout
Shutdown
Current Sink Channels
Maximum timeout setting
1.25
s
AccuLED_Ch
MatchLED_Ch
VDROPOUT
ILK_LED1
ILK_LED2
VFRSET
IFRSET
VTRSET
ITRSET
Channel Current Accuracy
VLED1 = VLED2 = 890mV,
ILED1 = ILED2 = 750mA
−10
10
%
Channel Current Matching
VLED1 = VLED2 = 890mV,
ILED1 = ILED2 = 750mA
−5
5
%
Current Sink Dropout
Boost is in regulation
100
mV
LED1 Leakage Current
VIN = 3.6 V, VEN = 0 V, VLED1 = 3.6 V
0.05
µA
LED2 Leakage Current
VIN = 3.6 V, VEN = 0 V, VLED2 = 3.6 V
0.05
µA
FRSET Pin Voltage
RFRSET = 10kΩ, flash mode
0.970 1.00 1.030
V
FRSET Current Sourcing
FRSET pin is shorted to ground,
flash mode
90
100
110
µA
TRSET Pin Voltage
RTRSET = 10kΩ, torch mode
0.970 1.00 1.030
V
TRSET Current Sourcing
TRSET pin is shorted to ground, torch
mode
90
100
110
µA
September 5, 2013
5
Revision 1.0