MAX1870AETJ+ Maxim Integrated Products, MAX1870AETJ+ Datasheet - Page 11

• Manufacturer Part Number: MAX1870AETJ+
• Description: Battery Management Li+ Step Up/Step Down Battery Charger
• Manufacturer: Maxim Integrated Products

Specifications of MAX1870AETJ+

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

(Circuit of Figure 1, V
4.11
4.10
4.09
4.08
4.07
4.06
4.05
4.04
4.03
0
-0.2
-0.4
0.8
0.6
0.4
0.2
500
0
REF LOAD REGULATION
-40
LOAD CURRENT (μA)
1000
-20
V
V
BATT
DCIN
______________________________________________________________________________________
SWITCHING WAVEFORM
IN
LDO vs. TEMPERATURE
STEP-UP/STEP-DOWN
= 16V
= 16V
0
TEMPERATURE (°C)
1500
= 16V, CELLS = REFIN, V
20
2.00μs
2000
40
60
2500
80
100
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
Typical Operating Characteristics (continued)
0
20V
10V
D4
0V
10V
D3 ANODE
0V
4A
2A
V
(AC-COUPLED)
200mV/div
-40
CLS =
BATT
INDUCTOR CURRENT
REFERENCE ERROR vs. TEMPERATURE
CATHODE
-20
V
REF
0
, V
TEMPERATURE (°C)
ICTL
20
= V
40
180
160
140
120
100
80
60
40
20
REFIN
0
0
60
= 3.3V, T
Li+ Battery Charger
V
Step-Up/Step-Down
80
V
BATT
OUTPUT VOLTAGE RIPPLE
SWITCHING WAVEFORM
IN
vs. BATTERY VOLTAGE
= 16V
5
= 12V
100
STEP-DOWN
A
V
2.00μs
= +25°C, unless otherwise noted.)
BATT
10
(V)
5.38
5.36
5.34
5.32
5.30
5.28
5.26
5.24
0
15
10
LDO LOAD REGULATION
20
V
IN
20
20V
10V
D4
0V
10V
D3 ANODE
0V
4A
2A
V
(AC-COUPLED)
10mV/div
LOAD (mA)
= 9V
BATT
INDUCTOR CURRENT
V
CATHODE
IN
= 28V
30
V
IN
= 16V
40
50
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