LTC3202EMS Linear Technology, LTC3202EMS Datasheet - Page 4

• Manufacturer Part Number: LTC3202EMS
• Description: IC LED DRVR WHITE BCKLGT 10-MSOP
• Manufacturer: Linear Technology
• Type: Backlight, White LEDr

Specifications of LTC3202EMS

• Topology: PWM, Switched Capacitor (Charge Pump)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 1.5MHz
• Voltage - Supply: 2.7 V ~ 4.5 V
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 125mA
• Internal Switch(s): Yes
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Output: -
• Efficiency: -

PI FU CTIO S
LTC3202
TYPICAL PERFOR A CE CHARACTERISTICS
D1, D0 (Pin 1, 10): Control Inputs. D0 and D1 determine
the set point voltage of the FB pin (see Table 1).
FB (Pin 2): FB is the Feedback Input for the Regulation
Control Loop.
V
impedance 1 F X5R or X7R ceramic capacitor is required
from V
V
with a 1 F to 4.7 F low impedance ceramic capacitor.
4
OUT
IN
U
(Pin 4): Input Supply Voltage. V
(Pin 3): V
OUT
U
to GND.
V
1V/DIV
2V/DIV
D0, D1
OUT
V
OUT
V
C
is the Output of the Charge Pump. A low
V
IN
OUT
OUT
U
= 3.6V
= 1 F
Soft-Start Ramp
W
200 s/DIV
U
IN
should be bypassed
300
280
260
240
220
200
180
2.7
3202 G08
Short-Circuit Current vs Supply
Voltage
3.0
3.3
INPUT SUPPLY (V)
3.6
GND (Pin 5): Ground for the Charge Pump and Control
Circuitry. This pin should be connected directly to a low
impedance ground plane.
C2
Capacitor Pins. A 1 F X5R or X7R ceramic capacitor
should be connected from C1
C2
PGND (Pin 11, Exposed Pad DFN Only): Power Ground
for the Charge Pump. This pin must be connected directly
to a low impedance ground plane.
(AC COUPLED)
(AC COUPLED)
–
–
3.9
, C1
.
20mV/DIV
20mV/DIV
C
V
V
T
FLY
FB
OUT
A
V
–
= 25 C
4.2
OUT
V
= 0V
, C1
IN
= 1 F
= 0V
3202 G07
V
C
I
Input and Output Ripple
OUT
IN
IN
4.5
+
= 3.6V
= C
, C2
= 60mA
OUT
+
= 1 F
(Pin 6, 7, 8, 9): Charge Pump Flying
500ns/DIV
+
to C1
3202 G09
–
and from C2
3202fa
+
to