LINEAR TECHNOLOGY LTC3204-3.3, LTC3204-5, LTC3204B-3.3, LTC3204B-5 Technical data

LTC3204-3.3/LTC3204-5/

FEATURES

DESCRIPTIO

U

TYPICAL APPLICATIO

U

APPLICATIO S

U

, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.

OFF ON

V

IN

GND

SHDN

V

OUT

C

–

C

+

LTC3204-5/
LTC3204B-5

2.2µF 2.2µF

2.2µF

5V

2.7V TO 5.5V

3204 TA01a

1, 7

2

3

4

5

6

OUTPUT CURRENT (mA)

0

0

OUTPUT RIPPLE (mVp-p)

5

10

15

20

30

25

50 75 100

3204 TA01b

125 150

25

OUTPUT CAPACITANCE = 2.2µF
VIN = 3.6V

LTC3204B-5

LTC3204-5

LTC3204B-3.3/LTC3204B-5

Low Noise Regulated

Charge Pump in 2 × 2 DFN

■

Fixed 3.3V or 5V Outputs

■

VIN Range:

1.8V to 4.5V (LTC3204-3.3/LTC3204B-3.3)

2.7V to 5.5V (LTC3204-5/LTC3204B-5)

■

Output Current:

Up to 150mA (LTC3204-5/LTC3204B-5)
Up to 50mA (LTC3204-3.3/LTC3204B-3.3)

■

Automatic Burst Mode® Operation with IQ = 48µA

(LTC3204-3.3/LTC3204-5)

■

Constant Frequency Operation at All Loads

(LTC3204B-3.3/LTC3204B-5)

■

Low Noise Constant Frequency (1.2MHz) Operation*

■

Built-In Soft-Start Reduces Inrush Current

■

Shutdown Disconnects Load from Input

■

Shutdown Current <1µA

■

Short-Circuit/Thermal Protection

■

Available in Low Profile 6-Lead DFN Package

■

2 AA Cell to 3.3V

■

Li-Ion to 5V

■

USB On-The-Go Devices

■

White LED Drivers

■

Handheld Devices

The LTC®3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5
are low noise, constant frequency (1.2MHz) switched ca­pacitor voltage doublers. The LTC3204-3.3/LTC3204B-3.3
can produce a regulated output voltage of 3.3V
from a minimum input voltage of 1.8V (2 alkaline cells)
whereas the LTC3204-5/LTC3204B-5 can produce 5V from
a minimum of 2.7V (Li-Ion battery) input.

LTC3204-3.3/LTC3204-5 feature automatic Burst Mode®
operation at light loads to maintain low supply current
whereas LTC3204B-3.3/LTC3204B-5 feature constant
frequency operation at any load. Built-in soft-start circuitry
prevents excessive inrush current during start-up. Thermal
shutdown and current-limit circuitry allow the parts to
survive a continuous short-circuit from V

to GND.

OUT

High switching frequency minimizes overall solution
footprint by allowing the use of tiny ceramic capaci­tors. In shutdown, the load is disconnected from the
input and the quiescent current is reduced to <1µA. The
LTC3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5 are
available in a low profile (0.75mm) 6-lead 2mm × 2mm
DFN package.

Burst Mode is a registered trademark of Linear Technology Corporation.
*Protected by U.S. Patents including 6411531.

Output Ripple vs Load Current

3204fa

1

LTC3204-3.3/LTC3204-5/

ABSOLUTE AXI U RATI GS

W

W W

U

FOR ATIO

PACKAGE/ORDER

I

U UW

ELECTRICAL CHARACTERISTICS

TOP VIEW

DC PACKAGE

6-LEAD (2mm × 2mm) PLASTIC DFN

4

5

6

7

3

2

1GND

V

IN

V

OUT

SHDN

C

–

C

+

LTC3204B-3.3/LTC3204B-5

(Note 1)

VIN to GND ................................................... –0.3V to 6V

V

to GND .............................................–0.3V to 5.5V

OUT

SHD

N to GND ...............................................– 0.3V to 6V

V

Short-Circuit Duration ............................. Indefinite

OUT

Operating Temperature Range (Note 2) ...–40°C to 85°C

Storage Temperature Range .................. –65°C to 125°C

Maximum Junction Temperature .......................... 125°C

The ● denotes the specifications which apply over the full operating
temperature range. Specifications are at TA = 25°C, VIN = 2.4V (LTC3204-3.3/LTC3204B-3.3) or 3.6V (LTC3204-5/LTC3204B-5),
SHDN = VIN, C

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VIN Input Voltage Range (LTC3204-3.3/LTC3204B-3.3)
(LTC3204-5/LTC3204B-5)

V

Output Voltage Range 1.8V < VIN < 4.5V, I

OUT

1.9V < VIN < 4.5V, I

2.7V < VIN < 5.5V, I

3.1V < VIN < 5.5V, I
IIN No Load Input Current I

I
I
I

I

Shutdown Current

SHD

N

I

Burst Mode Threshold (LTC3204-3.3) 15 mA

BURST

(LTC3204-5) 20 mA
VR Output Ripple I
η Efficiency VIN = 3V, I
f

Switching Frequency

OSC

VIH
VIL
IIH
IIL
ROL Effective Open-Loop Output VIN = 1.8V, V

Resistance (Note 3) VIN = 2.7V, V
I

Output Current Limit V

LIM

TSS Soft-Start Time From the Rising Edge of SHDN to 90% of V

Note 1: Absolute Maximum Ratings are those beyond which the life of a
device may be impaired.

Note 2: The LTC3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5 are
guaranteed to meet performance specifications from 0°C to 70°C.

2

= 2.2µF, CIN = 2.2µF, C

FLY

SHD

N Input Threshold

SHD

N Input Threshold

SHD

N Input Current

SHD

N Input Current

= 2.2µF unless otherwise noted.

OUT

= 0 (LTC3204-3.3) 48 µA

OUT

= 0 (LTC3204-5) 60 µA

OUT

= 0 (LTC3204B-3.3) 1.25 mA

OUT

= 0 (LTC3204B-5) 3.6 mA

OUT

SHD

N = 0V, V

= 100mA 20 mV

OUT

SHD

N = 0V

= OV 300 mA

OUT

ORDER PART

NUMBER
LTC3204EDC-3.3
LTC3204EDC-5
LTC3204BEDC-3.3
LTC3204BEDC-5

DC PART

MARKING

LBJV
LBNK

T

= 125°C, θJA = 80°C/W

JMAX

EXPOSED PAD IS GND (PIN 7)

MUST BE SOLDERED TO PCB

Consult LTC Marketing for parts specified with wider operating temperature ranges.

●

1.8 4.5 V

●

2.7 5.5 V

< 40mA

OUT

< 50mA (LTC3204-3.3/LTC3204B-3.3) ● 3.168 3.3

OUT

< 65mA

OUT

< 150mA (LTC3204-5/LTC3204B-5)

OUT

= 0V 1 µA

OUT

= 100mA (LTC3204-5/LTC3204B-5) 82 %

OUT

= 3V (LTC3204-3.3/LTC3204B-3.3) 7 Ω

OUT

= 4.5V (LTC3204-5/LTC3204B-5) 6 Ω

OUT

0.75 ms

OUT

Specifications over the –40°C to 85°C operating temperature range are
assured by design, characterization and correlation with statistical process
controls.

Note 3: ROL ≡ (2V

IN

– V

OUT

●

4.8 5

●

0.6 1.2 1.8 MHz

●

1.3 V

●

0.4 V

●

–1 1 µA

●

–1 1 µA

)/I

OUT

LBVF
LBVG

3.432

5.2

V

V

P-P

3204fa

LTC3204-3.3/LTC3204-5/

TYPICAL PERFOR

U W

CE CHARACTERISTICSA

TEMPERATURE (°C)

–50 150

3204 G05

0

50

100

TEMPERATURE (°C)

–50 150

0

50

100

3204 G04

THRESHOLD VOLTAGE (V)

0.7

0.8

0.6

0.5

0.9

SHDN THRESHOLD LO-TO-HI (V)

0.7

0.8

0.6

0.5

0.9

SHDN THRESHOLD HI-TO-LO (V)

0.6

0.7

0.5

0.4

0.8

SUPPLY VOLTAGE (V)

1.5

FREQUENCY (MHz)

1.50

1.25

1.00

0.75

0.50

0.25

0

2.0 2.5 3.0 3.5 4.0 4.5

3204 G01

SUPPLY VOLTAGE (V)

1.5 2.0 2.5 3.0 3.5 4.0 4.5

3204 G03

TEMPERATURE (°C)

–50

FREQUENCY (MHz)

1.4

1.3

1.2

1.1

1.0

0.9

0.8
–20 10 40 70 100 130

3204 G02

SUPPLY VOLTAGE (V)

SHORT-CIRCUIT CURRENT (mA)

350

300

250

200

150

100

50

0

3204 G06

1.5

2.0

2.5 3.0 3.5 4.0 4.5

DEVICE CYCLES

IN AND OUT OF

THERMAL SHUTDOWN

VIN = 4.5V

HIGH-TO-LOW THRESHOLD

LOW-TO-HIGH THRESHOLD

VIN = 3.2V

VIN = 3.2V

VIN = 1.8V

VIN = 1.8V

VIN = 2.4V

VIN = 1.8V

VIN = 2.4V

VIN = 2.4V

LTC3204B-3.3/LTC3204B-5

(TA = 25°C, C

= CIN = C

FLY

Oscillator Frequency vs
Supply Voltage

SHD

N LO-to-HI Threshold vs

Temperature

= 2.2µF unless otherwise specified)

OUT

Oscillator Frequency vs
Temperature

SHD

Temperature

N HI-to-LO Threshold vs

SHD

N Threshold Voltage vs

Supply Voltage

Short-Circuit Current vs Supply

3204fa

3

LTC3204-3.3/LTC3204-5/

SUPPLY VOLTAGE (V)

1.8

EFFICIENCY (%)

100

90

80

70

60

50

40

30

20

10

0

2.2

2.6

2.8

2.0

2.4

3.0

3.2

TEMPERATURE (°C)

–50

0

50

100

6

7

5

9

3204 G09

VIN = 1.8V
V

OUT

= 3V

3204 G12

3204 G07

SUPPLY VOLTAGE (V)

LOAD CURRENT (mA)

400

350

300

250

200

150

100

50

0

3204 G08

1.5

2.0

2.5 3.0 3.5

8

I

OUT

= 1mA

THEORETICAL MAX

I

OUT

= 30mA

LOAD CURRENT (mA)

0

OUTPUT VOLTAGE (V)

3.35

3.30

3.25

3.20

3.15

3.10

3.05
100 200 300 400 500

VIN = 1.8V

VIN = 2.4V

VIN = 3.2V

V

OUT

= 3.168V

TA = 25°C

TA = 90°C

TA = –45°C

SUPPLY VOLTAGE (V)

1.8

44

NO-LOAD INPUT CURRENT (µA)

NO-LOAD INPUT CURRENT (mA)

46

50

52

54

64

58

2.2

2.6

2.8

3204 G10

48

60

62

56

0

0.2

0.6

0.8

1.0

2.0

1.4

0.4

1.6

1.8

1.2

2

2.4

3

3.2

LTC3204B-3.3

LTC3204-3.3

LOAD CURRENT (mA)

0.01

0.1

EXCESS INPUT CURRENT (mA)

1

0.01 0.1 1 10 100

3204 G11

10

1000

LTC3204B-3.3
(NON-BURST MODE
OPERATION)

LTC3204-3.3
(BURST MODE
OPERATION)

VIN = 2.4V

TYPICAL PERFOR A CE CHARACTERISTICS

U W

LTC3204B-3.3/LTC3204B-5

(TA = 25°C, C

= CIN = C

FLY

= 2.2µF unless otherwise specified)

OUT

(LTC3204-3.3/LTC3204B-3.3 ONLY)

Load Regulation

No-Load Input Current vs
Supply Voltage

V

Soft-Start Response Output Ripple

OUT

Output Load Capability at 4%
Below Regulation

Extra Input Current vs Load Current
(IIN-2I

)

LOAD

Effective Open-Loop Output
Resistance vs Temperature

Efficiency vs Supply Voltage

Load Transient Response

V

OUT

2V/DIV

SHD

N

2V/DIV

VIN = 2.4V
I

LOAD

4

= 50mA

500µs/DIV

3204 G13 3204 G14 3204 G15

V

OUT

20mV/DIV

(AC COUPLED)

VIN = 2.4V
I

= 50mA

LOAD

500ns/DIV

V

20mV/DIV

(AC COUPLED)

50mA

I

OUT

30mA

OUT

VIN = 2.4V
I

= 30mA TO 50mA STEP

OUT

10µs/DIV

3204fa