Datasheet

3
LTC1522
TYPICAL PERFORMANCE CHARACTERISTICS
UW
INPUT VOLTAGE (V)
2.5
OUTPUT VOLTAGE (V)
5.05
5.10
5.15
4.5
1522 G01
5.00
4.95
4.90
3.0
3.5
4.0
5.0
I
OUT
= 10mA
C
OUT
= 10µF
T
A
= 70°C
T
A
= 25°C
T
A
= 0°C
INPUT VOLTAGE (V)
2.5
V
RIPPLE P-P
(mV)
150
200
250
4.5
1522 G03
100
50
0
3.0
3.5
4.0
5.0
I
OUT
= 10mA
C
FLY
= 0.1µF
T
A
= 25°C
C
OUT
= 6.8µF
C
OUT
= 10µF
C
OUT
= 22µF
C
OUT
= 3.3µF
INPUT VOLTAGE (V)
2.5
EFFICIENCY (%)
70
80
90
4.5
1522 G02
60
50
40
3.0
3.5
4.0
5.0
I
OUT
= 10mA
T
A
= 25°C
Output Voltage vs Input Voltage Efficiency vs Input Voltage Output Ripple vs Input Voltage
No Load Input Current
vs Input Voltage
Typical Output Voltage
vs Output Current
OUTPUT CURRENT (mA)
0
OUTPUT VOLTAGE (V)
5.0
5.1
80
1522 G05
4.9
4.8
20
40
60
5.2
V
IN
= 3.3V
V
IN
= 3V
V
IN
= 2.7V
T
A
= 25°C
C
FLY
= 0.1µF
C
OUT
= 6.8µF
Load Transient Response
I
OUT
0mA TO 10mA
10mA/DIV
V
OUT
AC COUPLED
50mV/DIV
V
IN
= 3V 500µs/DIV 1522 G06
C
OUT
= 10µF
PIN FUNCTIONS
UUU
NC (Pin 1): No Connect.
V
IN
(Pin 2): Input Supply Voltage. Bypass V
IN
with a
≥3.3µF low ESR capacitor.
V
OUT
(Pin 3): 5V Output Voltage (V
OUT
= 0V in Shutdown).
Bypass V
OUT
with a ≥3.3µF low ESR capacitor.
C
+
(Pin 4): Flying Capacitor, Positive Terminal.
C
–
(Pin 5): Flying Capacitor, Negative Terminal.
GND (Pin 6): Ground.
SHDN (Pin 7): Active High CMOS Logic-Level Shutdown
Input. Drive SHDN low to enable the DC/DC converter. Do
not float.
NC (Pin 8): No Connect.
INPUT VOLTAGE (V)
2.5
INPUT CURRENT (µA)
7
8
9
4.5
1522 G04
6
5
4
3.0
3.5
4.0
5.0
I
OUT
= 0mA
T
A
= 70°C
T
A
= 25°C
T
A
= 0°C