Max847 1-cell, step-up two-way pager system ic, Typical operating characteristics (continued) – Rainbow Electronics MAX847 User Manual
Page 6
MAX847
1-Cell, Step-Up
Two-Way Pager System IC
6
_______________________________________________________________________________________
Typical Operating Characteristics (continued)
(Circuit of Figure 2, T
A
= +25°C, unless otherwise noted.)
0
20
60
40
80
100
0.5
1
1.5
2
NO-LOAD BATTERY CURRENT
vs. BATTERY VOLTAGE
MAX847-toc04
BATTERY VOLTAGE (V)
BATTERY CURRENT (mA)
V
OUT
= 3.0V
COAST MODE
0
100
50
200
150
250
300
0
1
0.5
1.5
2
2.5
MAXIMUM LOAD CURRENT vs.
BATTERY VOLTAGE
MAX847-TOC05
BATTERY VOLTAGE (V)
MAXIMUM LOAD CURRENT (mA)
RUN MODE
COAST MODE
(VOUT = 3.0V)
1
10
100
START-UP INPUT VOLTAGE
vs. LOAD CURRENT
MAX847-TOC06
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
0
0.6
0.4
0.2
0.8
1.0
1.2
1.4
1.6
1.8
2.0
V
OUT
= 3.0V
COAST MODE
0
5
15
10
20
25
0
2
1
3
4
5
6
NICD CHARGING CURRENT vs.
NICD VOLTAGE
MAX847-TOC7
OUTPUT VOLTAGE (V)
NICD CHARGING CURRENT (mA)
15mA MODE
V
OUT
= 4.9V
20
-80
100
200
300
400
500
600
LX NOISE SPECTRUM
(RUN MODE, SYNC OPERATION)
-60
MAX847-09
FREQUENCY (kHz)
NOISE (dBV)
-40
-20
0
0
2
1
3
0
2
1
3
4
5
DR1 OR DR2 ON-RESISTANCE vs. V
OUT
MAX847-toc08
V
OUT
VOLTAGE (V)
R
ON
(
Ω
)
100
0
0.1
1
10
100
1000
10,000
REG2 NOISE SPECTRUM
(RUN MODE)
20
MAX847TOC-10
FREQUENCY (kHz)
NOISE (dB
µ
V)
40
60
80