-
IC
(3G)
(MP3)(GPS)..
IC IC
4.2V~2.7V 270~300
LWh 110~130
KgWh 3.6V
1.25V~1.55V 220~300
LWh 75~100
KgWh 1.5V
IC
1.1V~3.3V 3.3V 3.3V
(LDO)(Charge pump)(Buck converter)
-
(Single-ended Primary Inductor ConverterSEPIC)
(Low-DropoutLDO)
VI >VoVI VoVdrop out = VI - VoVoP
= I VdropoutVdropoutI
(LDO)
25%
IC LM317 LM337 Texas Instrument TPS6
ControlCircuit
OV1R
2R
rV
dsR
LR
_
+
_+ dropoutV
IV
+
_
1. 2. VI =Vout 85%VI >Vout 3. EMI (Audio)(Radio) 4. 5.
110xTPS6112xTPS6113x Linear
TechnologyLT1963LTC1705LT1764National Semiconductor LP398X
MAXIMMAX886X/887X/888X( Texas Instrument www.ti.com Linear
Technology www.linear.comNational Semiconductor
www.national.comMAXIMwww.maxim-ic.com)
(Charge pump)
http://www.ti.com/http://www.linear.com/http://www.national.com/http://www.maxim-ic.com/
-
(Charge pump)(Switched
capac
(Charge pump) IC
(b) D1
D2 C1 Vc1 Vc1 = (Vcc - Vd)
(2) C1 Vc1
(c) D1 D2
C2
itor converter) (Charge pump) IC IC C1,C2(a) NE555 4009UB D1,D2
C1,C2
1C
2C
CCV
CLK
OV_
+
(1)
Vd I
C1 C2 -(Vcc-2Vd)
C1
-
CCV
1C
2C1D
2D
OV_
+
(a)(Charge pump)
(b)(CLK)
(c)(CLK)
MAXIM
SW7, SW5 (ON)(OFF)C1,C2
1C
2C1D
2D
CCV OV_
+
+ _
I
1CV
1C
2C1D
2D
OV_
+
I
+ _1CV
IC MAX619 IC (1)SW1, SW3
VI
-
(2)SW2, SW4, SW6 (OFF)
5V20mA 3V 5V, 50mA:
3)VIVoIout(LDO)
VIC1,C2 C4 VoVI 3
rV
1R
2R
SWITCHCONTROL
IV
2C
1C
SW1
SW2
SW3
SW4
SW5
SW6
SW7
OV
3C
4C
+
_
+
_
MAXIM IC MAX619 MAX619 1.8V ~3.6V
Power loss = Iout [(2 3)VI-Vo] (2
-
(Charge pump) 1.(C pump) . LDO
arge pump) IC Texas Instrument C1682LTC1516/17 MAXIM
/1912/1916 ON semiconductor NCP5603 ( IM
(Buck converter) (a)
(1) VL = VI - Vo(b)
DT 0
-
90%
(a) (a)
(b)
Driver
LR
IV
L
C OV
+
_
+
_
+ _LV
1Q
2Q
L
LI
t
t
OVIV_
OV_
V
D T (1 D )T_
(b)
-
1. MOS FET .
. EMI (Lay out)
Vout/ VI )
rter) IC Texas Instrument LT1576 MAXIM
Texas MAXIM )
Q VL1,meanVL2,mean 0
I - VL1,mean- VL2,mean = VI T
23.45.(6.
(Buck conveTPS43000TPS40021Linear Technology LTC3404LTC3713
MAX1970MAX5073 (InstrumentLinear Technology
SEPIC (Single-ended Primary Industry Converter)
CL1VIL2C VC,mean = V
Q D Q L1
DTVI = (1-D) T (Vout +Vd+Vc,mean-VI) = (1-D) T (Vout+Vd)
IV
VdVout + =D1
D
1>D>0.5 IV
VdVout + 0.5>D>0
IVVdVout + < 1SEPIC
4.2V~2.7V 3.3V 10%VI 2.7VSEPIC
3.3V
D
-
SEPIC
(Charge pump)
(SEPIC) IC Texas Instrument TPS6 MAXIM
(
LDO BUCK SEPIC
1. 2.3. EMI 4. 5.6.
113XUCC39421Linear Technology LT1512LT1513LTC1871 MAX668MAX669 (
Texas InstrumentLinear Technology MAXIM )
[6] ) 600mAh 3.3V~2.7V
LDO
V battery = 4.2 ~ 3.6V 78% 93% 86%
10%(600mAh 10%) 60 60 60mAh mAh mAh
1C 2C
1D
OV
_
+
IV
+
_
1L
2L
C
+ _CV
PWM Q
-
46.8mAh 55.8mAh 51.6mAh
V battery =3.6 ~ 3.3V 91% 96% 86%
80%(600mAh 80%) 480mAh 480mAh 480mAh
436.8mAh 460.8mAh 412.8mAh
V battery =3.3 ~ 2.7V 0 0 86%
10%(600mAh 10%) 60mAh 60mAh 60mAh
0 0 51.6 mAh
483.6mAh 516.6mAh 516mAh
80.6% 86.1% 86%
-
( [6] )
(VCO)(PLL) LDO DSP
PowerManagement
System
Baseband(DSP,ARM,Memory)
RFUp & Down
PLL&
VCO
TCXO
W-LEDBacklightLEDs
VibratorMotor
ColorLCD
DSC ImageSensor(CCD)
DSC Motor
AudioSpeaker
MC
2.5V
5V
3.3V
15V
-7.5V
5V~3.3V
1.5~1.1V
2.5V~3.3V
2.8V
2.8V
2.8V
ConstantCurrent
2.8V
4.2~2.5V
RA
LNA
Texas Instrument TP65010, TPS5100, TPS61130 MAXIM MAX1586A/B,
MAX8621
IC DC DC IC
-
[1] www.maxim-ic.com/an669 [2] www.maxim-ic.com/an737 [3]
www.maxim-ic.com/an1051 [4] Ned Mohan, Tore M. Undeland, and
William P. Robbins, Power
electronics :converters, applications, and design, Wiley, New
York, 667pp, 1989. [5] Pressman, Abraham I., Switching power supply
design, McGraw-Hill, New
York, 926pp, 1991 [6] Jeff Falin, Texas Instrument,
2004 6 [7] Landa Pham, Texas Instrument,
2004 6 [8] IC 2001 [9]
1994
