Datasheet

4
LTC1928-5
Operating Current vs V
IN
(No Load)
BLOCK DIAGRA
W
–
+
–
+
CHARGE PUMP
AND
SLEW CONTROL
5
1
6
2
3
4
CN/SHDN
CP
CLK B
ENB
CPO
V
OUT
V
IN
C
FLY
0.47µF
C
CPO
4.7µF
C
OUT
4.7µF
POR/
SHDN
CONTROL
550kHz
OSCILLATOR
SD
BURST
V
REF
= 1.235V
–
+
C
IN
4.7µF
SD
GND
19285 BD
160Ω
V
IN
(V)
OPERATING CURRENT (µA)
260
240
220
200
180
160
140
120
100
19285 G07
2.5 3.0 3.5 4.0 4.5
T
A
= 25°C
Efficiency vs Supply Voltage
SUPPLY VOLTAGE (V)
2.6
40
EFFICIENCY (%)
50
70
80
90
3.0
3.4
3.6 4.4
19285 G08
60
2.8 3.2
3.8
4.0
4.2
100
T
A
= 25°C
I
OUT
= 15mA
C
FLY
= 0.47µF
Output Voltage vs Output Current
OUTPUT CURRENT (mA)
0
OUTPUT VOLTAGE (V)
35 40
19285 G09
51015
20
25 30
4.901
4.900
4.989
4.988
4.987
4.986
4.985
4.984
4.983
4.982
T
A
= 25°C
V
IN
= 3V
C
FLY
= 0.47µF
TYPICAL PERFOR A CE CHARACTERISTICS
UW