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Zetex Products For Mobile Phones
February 2007
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Applications within Mobile Phones
Camera Flash
RF Power Amplifier
Strobe Charger
MOSFET
MOSFETs and
Schottky Diode
Display
Backlighting
GPS Antenna
Detection
LED/OLED/LCD
Driver and
Schottky Diode
Current Monitor
Tuning Interface
Varactor Diodes
Power
Management
Low Drop Out
Regulators
Battery
Management
Current Monitor,
Transistor and
Schottky Diode
2
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Battery Management
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Cost Effective Unidirectional Gas Gauge
 A common mobile phone battery gas gauge uses VBATT and TBATT
– VBATT changes due to many factors
• QBATT, TBATT, IDSCH, IDSCH profile
IDSCH > I(C)
 Sensing IDSCH improves accuracy
 ZXCT1012 Micro-power Current
Monitor Provides Simple Solution
Mobile phone handset
RSENSE
– IDSCH is measured & can be used:
• Calculate charge remaining
• To protect battery
• To change capacity profile
ZXCT1012
– QBATT can be measured
+ Handset
battery
• From assumption of charging level
 System performance and user
interface greatly improved
 ZXCT1012 key features
– 3.5µA IQ
– Thin small footprint packages
• TSOT23-5 or TDFN3x3-5
2.7 to 4.2V
-
VOUT
4
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Typical Mobile Phone Charging Circuit
External Supply
Circuit demand on transistor

Using Zetex PNP can eliminate need
for a series connected Schottky diode
for reverse blocking

SOT23F, SOT23-6 or MLP packaging
to meet Pd at low battery condition

Low Saturation voltage to enable
lower input voltage
Main
Circuit
Power
Management
IC
Main
Battery
“Smallest, high dissipation switches”
5
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Transistor Package Comparison
Package
3L-DFN
8L-DFN
SOT23FF
SOT23-6
(flat)
Pin Out
Dimensions
LxWxH
2x2x1
3 x 2x 1
3 x 1.7 x 1
3 x 3.2 x 1.3
1.5
1.5
1.3
1.3
millimetres
Power
Dissipation
Watts
(25x25mm, 1oz)
6
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SOT23F (flat) package --------- New Package Introduction

Fits on same pcb footprint as SOT23
– 3mm x 2.5mm

Low profile package
– Max height 1mm
1mm
2.5mm

3mm
High power dissipation
– 1.3W (25 x 25mm, 2 oz copper)
– 1.5W (50 x 50mm, 2 oz copper)
– 2W (50 x 50mm, 2 oz copper, t ≤
5secs)
7
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PNP Transistors and Schottky for Battery Charging Circuit
Part
VCEO
VECO
IC
ICM
hFE
Number
min
V
V
A
A
ZXT13P20DE6
-20
-
-3.5
-10
300
300
ZXT10P20DE6
-20
-
-2.5
-6
300
150
ZXTP25020CFF
-20
-7
-4.5
-10
ZXT2M322
-20
-
-3.5
-6
ZXTD2M832 *
-20
-
-3.5
-6
FMMT718
-20
-
-1.5
-6
VCE(sat)
Max
900
PD
Package
@ IC
max
@ IC
@ IB
A
mV
A
mA
W
-0.01
-1
-65
-130
-0.1
-1
-10
-10
1.1
SOT23-6
-0.1
-2
-30
-220
-0.1
-1
-10
-20
1.1
SOT23-6
200
150
300
150
300
150
500
-
0.01
-1
-0.1
-2
-0.1
-2
-110
-185
-220
-250
-220
-250
-1
-2
-1
-1.5
-1
-1.5
-20
-40
-20
-50
-20
-50
1.5
1.5
8L-DFN
3 x 2 mm
300
150
-
-0.1
-2
-220
-250
-1
-1.5
-20
-50
0.625
SOT23
Capacitance
trr
PD
1.1
SOT23
flat
3L-DFN
2 x 2mm
* Dual device for phones with adaptor plus USB charging
Part
VR
IF
IFSM
Number
ZLLS1OOO
VF
IR
max
@ IF
max
@ VR
Typ
@ VR
Typ
V
A
A
mV
mA
µA
V
pF
V
ns
W
40
1.16
22
560
460
1.0
0.5
20
30
26
30
4
0.625
Package
SOT23
8
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Power Management
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150mA LDOs in SC70-5 and SOT23-5
The ZXCL range of low dropout regulators are inherently stable with tantalum and ceramic
capacitor values  1µF.
Low output noise (50µVRMS) and good PSRR (56dB) is achieved without the need for
additional bypass capacitors.
1.5V and 1.8V variants can be made available.
Family
Output Voltage
Tolerance at 100mA
Input Voltage - Max
Dropout Voltage – Typ
Dropout Voltage - Max
IQ - Max
Output Current - Max
IQ Shut Down - Max
Line Regulation - Max
Load Reg - Max 1- 100m
Package
ZXCL
MIC5213
2.5, 2.6, 2.8, 3.0, 3.3, 2.5, 2.6, 2.7, 2.8, 3.0,
4.0
3.3, 3.6, 5.0
±2%
±3%
5.5
16
85mV @ 50mA
250mV @ 50mA
280mV @ 100mA
600mv @ 80mA
50µA
180µA typ
150mA
80mA
1µA
10µA
0.1%
0.3%
0.04%
0.5%
SC70-5, SOT23-5
SC70-5
MAX8511
1.5, 1.8, 2.5, 2.7, 2.8,
2.85, 3.0, 3.3, 4.5
±1%
6
80mV @ 80mA
170mV @ 80mA
90µA
120mA
1µA
No Max
No Max
SC70-5
10
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RF Power Amplifier
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MOSFETs and Schottky for within the RF Power Amplifier
Part
VDS
ID
IDM
Number
V
A
A
RDS(on)
QG
Ciss
Package
PD
max
@ VGS
@ ID
@ 4.5V @ 10V
mΩ
V
A
nC
pF
W
N-Channel MOSFET for Level Shifting
ZXMN2B01F
20
2.1
11.8
100
200
4.5
1.8
2.4
1.7
4.8
370
0.625
SOT23
ZXMN2A01F
20
2.1
11.8
120
225
4.5
2.5
4.0
1.5
4.8
370
0.625
SOT23
P-Channel MOSFET for PA Switch
-20
-3.5
-18
55
170
-4.5
-1.8
-2.5
-1.0
6.6
486
1.0
SOT23 Flat
ZXMP2B19FH
-20
-3.5
-18
55
170
-4.5
-1.8
-2.5
-1.0
6.6
486
1.0
SOT23
VR
IF
IFSM
Part
Number
ZLLS1OOO
VF
IR
Capacitance
max
@ IF
max
@ VR
Typ
@ VR
PD
V
A
A
mV
mA
µA
V
pF
V
W
40
1.16
22
560
460
1.0
0.5
20
30
26
30
0.625
Advance Info
Advance Info
ZXMP2B19FF
Package
SOT23
12
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LCD Display & Backlighting
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Zetex LED driver ICs
Designed specifically to drive white LEDs for a wide range
of existing and emerging applications, Zetex LED driver
solutions provide high efficiency, cost effectiveness and
versatility.
Key features:

Programmable LED current

<5µA shutdown current

High efficiency: 94%

Low 100mV feedback voltage for high efficiency

Series, parallel and series parallel connection combinations

Complementary external switches and Schottky diodes
Key Existing Products:

ZXLD11xx / 19xx series
14
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Boost converters for LCD / OLED bias
These boost converters provide an adjustable bias voltage of up to
28V for LCD and OLED displays.
Key features:

Adjustable output voltage up to 28V

Wide input voltage range: 1.6V to 5.5V (ZXLB16xx series)

<1µA typical shutdown current (ZXLD16xx series)

85% efficiency (ZXLB1600) / 80% (ZXLD16xx series)

PWM & analog control input (ZXLD16xx series)

True shutdown with output isolated from supply (ZXLB16xx
series)
Key products:

ZXLB16xx series (MSOP-10 Package)

ZXLD16xx series (TSOT23-5 and SC70-6 Package)
15
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Boost converters for LCD / OLED bias
Typical Application Circuit; ZXLD1601
Typical Application Circuit; ZXLD1615
Product Part Number
Description
EV Order Number
ZXLB1600X10
ZXLB1600 LCD & OLED Bias
#ZXLB1600EV1
ZXLD1100H6
ZXLD1100 LED driver board
#ZXLD1100EV1
ZXLD1100H6
Mobile LED Flash Unit
#ZXLD1100EV2
ZXLD1615ET5
ZXLD1615 LCD & OLED Bias
#ZXLD1615EV1
ZXLD1937ET5
ZXLD1937 LED driver boards
#ZXLD1937EV1
Typical Application Circuit; ZXLB1600 ZXLD1601/1615
16
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Photo Flash
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Photoflash charger ICs
The ZXSC44x series have a flyback efficiency of 75%, much
higher than commonly used discrete charging circuits.
Key features:

Dedicated photoflash charger ICs

Charges 80µF to 300V in 3.5 sec from 3V supply

Operates from 1.8V to 8V supply

>75% flyback efficiency

Idle current: only 4.5µA when cap is charged

Total solution: control IC, bipolar transistor or MOSFET and
Schottky diode

Small MSOP8 package
Key applications:
 Digital camera flash unit
 Film camera flash unit
 Rescue / safety flash strobe
Key products:

ZXSC44x series
18
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Photoflash charger ICs – ZXSC440
Product Part Number Description
Evaluation Board No. Date.
ZXSC440X8
#ZXSC440EV1
ZXSC440 Photoflash Charger
Status
Nov-04 Active
19
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