LTC3216 Datasheet, PDF (2/12 Pages) Linear Technology – 1A Low Noise High Current LED Charge Pump with Independent Torch/Flash Current Control

LTC3216
ABSOLUTE AXI U RATI GS
(Note 1)
V_IN to GND ................................................ –0.3V to 5.5V
CPO to GND .............................................. –0.3V to 5.5V
EN2, EN1 ......................................... –0.3V to V_IN + 0.3V
I_CPO, I_ILED (Note 2) ........................................... 1500mA
CPO Short-Circuit Duration ............................. Indefinite
Operating Temperature Range (Note 3) ...–40°C to 85°C
Storage Temperature Range ..................–65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
C2⁺ 1
C1⁺ 2
CPO 3
I_SET1 4
I_LED 5
I_SET2 6
TOP VIEW
12 C1^–
11 GND
10 C2^–
13
9 VIN
8 EN2
7 EN1
DE12 PACKAGE
12-LEAD (4mm × 3mm) PLASTIC DFN
EXPOSED PAD IS GND (PIN 13)
MUST BE SOLDERED TO PCB
T_JMAX = 125°C, θ_JA = 43°C/W
ORDER PART
NUMBER
LTC3216EDE
DFN PART
MARKING
3216
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V, C_IN = C1 = C2 = 2.2µF, C_CPO = 4.7µF
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Input Power Supply
V_IN Operating Voltage
I_VIN Operating Current
I_VIN Shutdown Current
LED Current
I_CPO = 0mA, 1x Mode
I_CPO = 0mA, 1.5x
I_CPO = 0mA, 2x Mode
EN2 = EN1 = LOW
q 2.9
4.4
V
300
µA
7
mA
9.2
mA
2.5
7
µA
LED Current Ratio (I_LED/I_SET1/2)
I_LED Dropout Voltage
Mode Switching Delay
(LED Warmup Time)
I_LED = 200mA to 800mA
Mode Switch Threshold, I_LED = 200mA
EN1 = HIGH, EN2 = LOW
EN1 = LOW or HIGH, EN2 = HIGH
q 3120 3250 3380 mA/mA
120
mV
150
ms
2
ms
LED Current On Time
EN to LED Current On
130
µs
Charge Pump (CPO)
1x Mode Output Voltage
1.5x Mode Output Voltage
2x Mode Output Voltage
1x Mode Output Impedance
I_CPO = 0mA
I_CPO = 0mA
I_CPO = 0mA
V_IN
V
4.6
V
5.1
V
0.25
Ω
1.5x Mode Output Impedance
2x Mode Output Impedance
CLK Frequency
V_IN = 3.4V, V_CPO < 4.6V, C1 = C2 = 2.2µF
1.5
Ω
V_IN = 3.2V, V_CPO < 5.1V, C1 = C2 = 2.2µF
1.7
Ω
q 0.6
0.9
1.2
MHz
EN1, EN2
High Level Input Voltage (V_IH)
Low Level Input Voltage (V_IL)
Input Current (I_IH)
Input Current (I_IL)
q 1.4
q
q –1
q –1
V
0.4
V
1
µA
1
µA
3216fa
2