MAX8662 Просмотр технического описания (PDF) - Maxim Integrated
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MAX8662 Datasheet PDF : 34 Pages
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Power-Management ICs for
Single-Cell, Li+ Battery-Operated Devices
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VDC = 5V, RPSET = 1.5kΩ, RISET = 3kΩ, VOUT1 = 3.3V, VOUT2 = 1.3V, SL1 = SL2 = open, VCEN = 0V, VPEN1 =
VPEN2 = 5V, COUT1 = 2 x 10µF, COUT2 = 2 x 10µF, COUT3 = 0.1µF, COUT4 = 4.7µF, COUT5 = 1µF, COUT6 = 2.2µF, COUT7 = 1µF, CT =
0.068µF, CREF = CVL = 0.1µF, RTHM = 10kΩ, L1 = 3.3µH, L2 = 4.7µH, L3 = 22µH, VGND = VPG1 = VPG2 = VPG3 = 0V, TA = +25°C,
unless otherwise noted.)
AC ADAPTER CONNECT (ISYS = 500mA)
MAX8662/63 toc18
5V/div
VDC 0V
IIN 0mA
5V
+1280mA
1A/div
VSYS
VPOK
4.0V
VCHG
5V
4.4V
2V/div
5V/div
USB DISCONNECTED (500mA USB)
MAX8662/63 toc19
VDC
5V
475mA
5V/div
IIN
500mA/div
4.4V
VSYS
1V/div
5V/div
0V
500mA
1A/div
IBAT
-780mA
NEGATIVE BATTERY CURRENT FLOWS
INTO THE BATTERY (CHARGING).
VCHG
0V
IBAT
-475mA
5V/div
0mA
500mA/div
400µs/div
PEN1 = PEN2 = 1, CEN = 0,
VBAT = 4.0V, ISYS = 500mA, EN_ = 1
200µs/div
PEN1 = 0, PEN2 = 1, CEN = 0,
VBAT = 4.0V, ISYS = 0mA
VCEN
IIN
VSYS
VCHG
IBAT
CHARGER ENABLE (ISYS = 0mA)
MAX8662/63 toc20
2.8V
0mA
0V
5V/div
475mA
1A/div
5V
4.4V
2V/div
0V
5V/div
0mA
-475mA 500mA/div
200µs/div
PEN1 = 0, PEN2 = 1, VBAT = 4.0V, ISYS = 0mA, EN_ = 1
OUT1 REGULATOR EFFICIENCY
vs. LOAD CURRENT
100
90
80
70
VBAT = 3.6V
60
50 VBAT = 4.2V
40
VBAT = 3.6V
VBAT = 4.2V
30
20
10
0
0.1
PWM = 0
PWM = 1
VOUT1 = 3.3V
1
10 100 1000 10,000
LOAD CURRENT (mA)
OUT1 REGULATOR LOAD REGULATION
3.40
3.36
VBAT = 4.2V
3.32
3.28
VBAT = 3.6V
3.24
3.20
0.1
1
10 100 1000 10,000
LOAD CURRENT (mA)
OUT1 REGULATOR LINE REGULATION
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
RLOAD = 330Ω
2.5
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
VSYS (V)
OUT1 VOLTAGE vs. TEMPERATURE
3.310
VBAT = 4.0V
RLOAD = 330Ω
3.306
3.302
3.298
3.294
3.290
-40 -15
10
35
60
85
AMBIENT TEMPERATURE (°C)
10 ______________________________________________________________________________________
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