LTC3204-3.3/LTC3204-5/
LTC3204B-3.3/LTC3204B-5
Low Noise Regulated
Charge Pump in 2 2 DFN
FEATURES DESCRIPTIO
Fixed 3.3V or 5V Outputs The LTC 3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5
V Range: are low noise, constant frequency (1.2MHz) switched ca-
IN
1.8V to 4.5V (LTC3204-3.3/LTC3204B-3.3) pacitor voltage doublers. The LTC3204-3.3/LTC3204B-3.3
2.7V to 5.5V (LTC3204-5/LTC3204B-5) can produce a regulated output voltage of 3.3V
Output Current: from a minimum input voltage of 1.8V (2 alkaline cells)
Up to 150mA (LTC3204-5/LTC3204B-5) whereas the LTC3204-5/LTC3204B-5 can produce 5V from
Up to 50mA (LTC3204-3.3/LTC3204B-3.3) a minimum of 2.7V (Li-Ion battery) input.
Automatic Burst Mode Operation with I = 48A
Q
LTC3204-3.3/LTC3204-5 feature automatic Burst Mode
(LTC3204-3.3/LTC3204-5)
operation at light loads to maintain low supply current
Constant Frequency Operation at All Loads
whereas LTC3204B-3.3/LTC3204B-5 feature constant
(LTC3204B-3.3/LTC3204B-5)
frequency operation at any load. Built-in soft-start circuitry
Low Noise Constant Frequency (1.2MHz) Operation*
prevents excessive inrush current during start-up. Thermal
Built-In Soft-Start Reduces Inrush Current
shutdown and current-limit circuitry allow the parts to
Shutdown Disconnects Load from Input
survive a continuous short-circuit from V to GND.
OUT
Shutdown Current <1A
High switching frequency minimizes overall solution
Short-Circuit/Thermal Protection
footprint by allowing the use of tiny ceramic capaci-
Available in Low Prole 6-Lead DFN Package
U tors. In shutdown, the load is disconnected from the
APPLICATIO S
input and the quiescent current is reduced to <1A. The
LTC3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5 are
2 AA Cell to 3.3V
available in a low prole (0.75mm) 6-lead 2mm 2mm
Li-Ion to 5V
DFN package.
USB On-The-Go Devices
, LTC and LT are registered trademarks of Linear Technology Corporation.
White LED Drivers
All other trademarks are the property of their respective owners.
Handheld Devices Burst Mode is a registered trademark of Linear Technology Corporation.
*Protected by U.S. Patents including 6411531.
TYPICAL APPLICATIO
Output Ripple vs Load Current
30
OUTPUT CAPACITANCE = 2.2 F
2.2 F
V = 3.6V
IN
25
5 4
+
C
C
2 3
20
2.7V TO 5.5V V V 5V
OUT
IN
2.2 F LTC3204-5/ 2.2 F
15 LTC3204-5
LTC3204B-5
1, 7
GND
10
6
LTC3204B-5
OFF ON SHDN
5
3204 TA01a
0
0 25 50 75 100 125 150
OUTPUT CURRENT (mA)
3204 TA01b
3204fa
1
OUTPUT RIPPLE (mVp-p)
U
ULTC3204-3.3/LTC3204-5/
LTC3204B-3.3/LTC3204B-5
U W U
ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO
(Note 1)
ORDER PART
V to GND ...................................................0.3V to 6V NUMBER
IN
V to GND .............................................0.3V to 5.5V LTC3204EDC-3.3
OUT
TOP VIEW
SHDN to GND ...............................................0.3V to 6V LTC3204EDC-5
V Short-Circuit Duration ............................. Indenite LTC3204BEDC-3.3
OUT
GND 1 6 SHDN
Operating Temperature Range (Note 2) ...40C to 85C LTC3204BEDC-5
2 7
V 5 C
IN
DC PART
Storage Temperature Range .................. 65C to 125C
+
V 3 4 C
OUT
MARKING
Maximum Junction Temperature .......................... 125C
LBJV
DC PACKAGE
6-LEAD (2mm 2mm) PLASTIC DFN
LBNK
T = 125C, = 80C/W
JMAX JA
LBVF
EXPOSED PAD IS GND (PIN 7)
MUST BE SOLDERED TO PCB
LBVG
Consult LTC Marketing for parts specied with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The denotes the specications which apply over the full operating
temperature range. Specications are at T = 25C, V = 2.4V (LTC3204-3.3/LTC3204B-3.3) or 3.6V (LTC3204-5/LTC3204B-5),
A IN
SHDN = V , C = 2.2F, C = 2.2F, C = 2.2F unless otherwise noted.
IN FLY IN OUT
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V Input Voltage Range (LTC3204-3.3/LTC3204B-3.3) 1.8 4.5 V
IN
(LTC3204-5/LTC3204B-5) 2.7 5.5 V
V Output Voltage Range 1.8V < V < 4.5V, I < 40mA
OUT IN OUT
1.9V < V < 4.5V, I < 50mA (LTC3204-3.3/LTC3204B-3.3) 3.168 3.3 3.432 V
IN OUT
2.7V < V < 5.5V, I < 65mA
IN OUT
3.1V < V < 5.5V, I < 150mA (LTC3204-5/LTC3204B-5) 4.8 5 5.2 V
IN OUT
I No Load Input Current I = 0 (LTC3204-3.3) 48 A
IN OUT
I = 0 (LTC3204-5) 60 A
OUT
I = 0 (LTC3204B-3.3) 1.25 mA
OUT
I = 0 (LTC3204B-5) 3.6 mA
OUT
I Shutdown Current SHDN = 0V, V = 0V 1 A
SHDN OUT
I Burst Mode Threshold (LTC3204-3.3) 15 mA
BURST
(LTC3204-5) 20 mA
V Output Ripple I = 100mA 20 mV
R OUT P-P
Efciency V = 3V, I = 100mA (LTC3204-5/LTC3204B-5) 82 %
IN OUT
f Switching Frequency 0.6 1.2 1.8 MHz
OSC
V SHDN Input Threshold 1.3 V
IH
V SHDN Input Threshold 0.4 V
IL
I SHDN Input Current 1 1 A
IH
I SHDN Input Current SHDN = 0V 1 1 A
IL
R Effective Open-Loop Output V = 1.8V, V = 3V (LTC3204-3.3/LTC3204B-3.3) 7
OL IN OUT
Resistance (Note 3) V = 2.7V, V = 4.5V (LTC3204-5/LTC3204B-5) 6
IN OUT
I Output Current Limit V = OV 300 mA
LIM OUT
T Soft-Start Time From the Rising Edge of SHDN to 90% of V 0.75 ms
SS OUT
Note 1: Absolute Maximum Ratings are those beyond which the life of a Specications over the 40C to 85C operating temperature range are
device may be impaired. assured by design, characterization and correlation with statistical process
controls.
Note 2: The LTC3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5 are
guaranteed to meet performance specications from 0C to 70C. Note 3: R (2V V )/I
OL IN OUT OUT
3204fa
2
U W W W