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Zetex Products For Mobile Phones

February 2007

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Applications within Mobile Phones

Display Backlighting

LED/OLED/LCD Driver and

Schottky Diode

Battery Management

Current Monitor, Transistor and Schottky Diode

Tuning Interface

Varactor Diodes

RF Power Amplifier

MOSFETs and Schottky Diode

Power Management

Low Drop Out Regulators

GPS Antenna Detection

Current Monitor

Camera Flash

Strobe ChargerMOSFET

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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– IDSCH is measured & can be used:

• Calculate charge remaining• To protect battery• To change capacity profile

– QBATT can be measured• From assumption of charging level

System performance and userinterface greatly improved

ZXCT1012 key features– 3.5µA IQ

– Thin small footprint packages • TSOT23-5 or TDFN3x3-5

Handsetbattery

2.7 to 4.2V

ZXCT1012

RSENSE

VOUT

+

-

Mobile phone handset

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Typical Mobile Phone Charging Circuit

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

MainBattery

PowerManagementIC

External Supply

MainCircuit

“Smallest, high dissipation switches”

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Transistor Package Comparison

Package 3L-DFN 8L-DFN SOT23FF

(flat)

SOT23-6

Pin Out

Dimensions

L x W x H

millimetres

2 x 2 x 1 3 x 2x 1 3 x 1.7 x 1 3 x 3.2 x 1.3

Power

Dissipation

Watts

(25x25mm, 1oz)

1.5 1.5 1.3 1.3

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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

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)3mm

2.5mm

1mm

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PNP Transistors and Schottky for Battery Charging Circuit

Part VCEO VECO IC ICM hFE VCE(sat) PD Package

Number min Max @ IC max @ IC @ IB

V V A A A mV A mA W

ZXT13P20DE6 -20 - -3.5 -10 300300

-900

-0.01-1

-65-130

-0.1-1

-10-10 1.1 SOT23-6

ZXT10P20DE6 -20 - -2.5 -6 300150

-0.1-2

-30-220

-0.1-1

-10-20 1.1 SOT23-6

ZXTP25020CFF -20 -7 -4.5 -10 200150

500-

0.01-1

-110-185

-1-2

-20-40 1.1 SOT23

flat

ZXT2M322 -20 - -3.5 -6 300150

--

-0.1-2

-220-250

-1-1.5

-20-50 1.5 3L-DFN

2 x 2mm

ZXTD2M832 * -20 - -3.5 -6300150

--

-0.1-2

-220-250

-1-1.5

-20-50 1.5 8L-DFN

3 x 2 mm

FMMT718 -20 - -1.5 -6 300150

--

-0.1-2

-220-250

-1-1.5

-20-50 0.625 SOT23

* Dual device for phones with adaptor plus USB charging

Part VR IF IFSM VF IR Capacitance trr PD Package

Number max @ IF max @ VR Typ @ VR Typ

V A A mV mA µA V pF V ns W

ZLLS1OOO 40 1.16 22 560460

1.00.5

20 30 26 30 4 0.625 SOT23

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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 ZXCL MIC5213 MAX8511Output Voltage 2.5, 2.6, 2.8, 3.0, 3.3,

4.02.5, 2.6, 2.7, 2.8, 3.0,

3.3, 3.6, 5.01.5, 1.8, 2.5, 2.7, 2.8,

2.85, 3.0, 3.3, 4.5Tolerance at 100mA ±2% ±3% ±1%Input Voltage - Max 5.5 16 6Dropout Voltage – Typ 85mV @ 50mA 250mV @ 50mA 80mV @ 80mADropout Voltage - Max 280mV @ 100mA 600mv @ 80mA 170mV @ 80mAIQ - Max 50µA 180µA typ 90µAOutput Current - Max 150mA 80mA 120mAIQ Shut Down - Max 1µA 10µA 1µALine Regulation - Max 0.1% 0.3% No MaxLoad Reg - Max 1- 100m 0.04% 0.5% No MaxPackage SC70-5, SOT23-5 SC70-5 SC70-5

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RF Power Amplifier

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MOSFETs and Schottky for within the RF Power Amplifier

Part VDS ID IDM RDS(on) QG Ciss PD Package

Number max @ VGS @ ID @ 4.5V @ 10V

V A A mΩ V A nC pF W

N-Channel MOSFET for Level Shifting

ZXMN2B01F 20 2.1 11.8 100200

4.51.8

2.41.7 4.8 370 0.625 SOT23

ZXMN2A01F 20 2.1 11.8 120225

4.52.5

4.01.5 4.8 370 0.625 SOT23

P-Channel MOSFET for PA Switch

ZXMP2B19FF -20 -3.5 -18 55170

-4.5-1.8

-2.5-1.0 6.6 486 1.0 SOT23 Flat

ZXMP2B19FH -20 -3.5 -18 55170

-4.5-1.8

-2.5-1.0 6.6 486 1.0 SOT23

Advance Info

Advance Info

Part VR IF IFSM VF IR Capacitance PD Package

Number max @ IF max @ VR Typ @ VR

V A A mV mA µA V pF V W

ZLLS1OOO 40 1.16 22 560460

1.00.5

20 30 26 30 0.625 SOT23

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LCD Display & Backlighting

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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

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.

Zetex LED driver ICs

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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)

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Boost converters for LCD / OLED bias

Typical Application Circuit; ZXLB1600 ZXLD1601/1615

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

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Photo Flash

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Photoflash charger ICs

Key applications: Digital camera flash unit Film camera flash unit Rescue / safety flash strobe

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 products: ZXSC44x series

The ZXSC44x series have a flyback efficiency of 75%, much higher than commonly used discrete charging circuits.

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Photoflash charger ICs – ZXSC440

Product Part Number Description Evaluation Board No. Date. Status

ZXSC440X8 ZXSC440 Photoflash Charger #ZXSC440EV1 Nov-04 Active