LTC1928-5
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Operating Current vs VIN
(No Load)
Efficiency vs Supply Voltage
Output Voltage vs Output Current
260
240
220
200
180
160
140
120
100
100
90
4.901
4.900
4.989
4.988
4.987
4.986
4.985
4.984
4.983
4.982
T
I
= 25°C
T
V
C
= 25°C
T
= 25°C
A
A
A
= 15mA
= 3V
OUT
IN
C
= 0.47µF
= 0.47µF
FLY
FLY
80
70
60
50
40
20
OUTPUT CURRENT (mA)
0
5
10 15
25 30 35 40
2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4
SUPPLY VOLTAGE (V)
2.5
3.0
3.5
(V)
4.0
4.5
V
IN
19285 G07
19285 G09
19285 G08
W
BLOCK DIAGRA
C
FLY
0.47µF
CP
CN/SHDN
6
5
CHARGE PUMP
AND
CPO
V
4
1
IN
C
CPO
SLEW CONTROL
C
IN
4.7µF
4.7µF
–
+
ENB
CLK B
+
–
POR/
SHDN
CONTROL
BURST
550kHz
OSCILLATOR
SD
+
–
V
3
OUT
V
= 1.235V
REF
C
OUT
4.7µF
160Ω
SD
19285 BD
2
GND
4
Linear [ Linear ]
