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ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - DC/DC voltage regulator Switched-capacitor voltage converter HTSSOP 20

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SLVS273− FEBRUARY 2000

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

features

D Regulated 5 V ± 4% Output Voltage With up

to 100 mA Output Current From a 1.8 V to

3.6 V Input Voltage Range

D 65-µA Quiescent Supply Current

D 0.05-µA Shutdown Current, Battery Is

Isolated From Load in Shutdown

D Integrated Low-Battery or Power-Good

Indicator

D Low Output Voltage Ripple Over Complete

Output Current Range

D Easy-To-Design With Low-EMI Power

Supply Since no Inductors Are Required

D Evaluation Module Available

(TPS60140EVM-144)

applications

D Replaces DC/DC Converters With Inductors

in Battery-Powered Applications:

− Two Battery Cells to 5 V Conversion

− Portable Instruments

− Miniature Equipment

− Backup-Battery Boost Converters

− Medical Instruments

− 5-V Smart Card Supply

− Organizers, PDAs

description

The TPS6014x step-up, regulated charge pumps

generate a 5-V ±4% output voltage from a 1.8 V

to 3.6 V input voltage range. The devices are

typically powered by two alkaline, NiCd, or NiMH

battery cells and provide an output current of

minimum 100 mA from a 2-V input. Only four

external capacitors are needed to build a

complete voltage tripler charge pump.

The devices regulate the output by using the

pulse-skip topology. The controller is optimized for

lowest output voltage ripple over the complete output current range. The output peak current and therefore the

output voltage ripple are drastically reduced compared to a conventional pulse-skip topology by regulating the

charge pump output resistance. At light loads the maximum output resistance is limited to assure a low

quiescent current.

The TPS60140 includes a low-battery comparator that issues a warning if the battery voltage drops below a

user-adjustable threshold voltage. The TPS60141 features a power-good output that goes active when the

output voltage reaches 90% of its nominal value.

The logic shutdown function disables the converter, reduces the supply current to a maximum of 1 µA and

disconnects the output from the input. Special current-control circuitry prevents excessive current from being

drawn from the battery during start-up. This dc-dc converter requires no inductors, therefore, EMI is of little

concern. It is available in the small, thermally enhanced 20-pin TSSOP package (PWP).

typical operating circuit

IN OUT

TPS60140

IN FB

LBI LBO

Low

Battery

Warning

Output

5 V, 100 mA

10 µF

C2+

C2−

2.2 µF

C1+

C1−

2.2 µF

ENABLE

PGND GND

OFF/ON

4.7 µF

Input

1.8 V to 3.6 V

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a trademark of Texas Instruments Incorporated.

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Summary of content (23 pages)

PAGE 1
SLVS273− FEBRUARY 2000 features applications D Regulated 5 V ± 4% Output Voltage With up D Replaces DC/DC Converters With Inductors D D D D D D to 100 mA Output Current From a 1.8 V to 3.6 V Input Voltage Range 65-µA Quiescent Supply Current 0.
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SLVS273− FEBRUARY 2000 AVAILABLE OPTIONS PART NUMBER† TA −40°C to 85°C TPS60140PWP TPS60141PWP PACKAGE PWP DEVICE FEATURES 20-pin thermally enhanced TSSOP 2-cell to 5 V, 100 mA Low-battery detector Power-good detector † The PWP package is available taped and reeled. Add an R suffix to the device type (e.g. TPS60140PWPR) to order quantities of 2000 devices per reel.
PAGE 3
SLVS273− FEBRUARY 2000 functional block diagrams TPS60140 IN C1+ Oscillator C1 C1− _ ENABLE PGND IN Charge Pump Power Stage C2+ + Control Circuit C2 + − VREF C2− OUT PGND FB LBO Shutdown/ Start-up Control _ _ + + + − LBI + − 0.
PAGE 4
SLVS273− FEBRUARY 2000 Terminal Functions TERMINAL NAME C1+ NO. I/O DESCRIPTION 6 Positive terminal of the flying capacitor C1 C1− 8 Negative terminal of the flying capacitor C1 C2+ 15 Positive terminal of the flying capacitor C2 C2− 13 Negative terminal of the flying capacitor C2 ENABLE 3 I ENABLE input. Connect ENABLE to IN for normal operation.
PAGE 5
SLVS273− FEBRUARY 2000 detailed description (continued) start-up procedure and shutdown During start-up, i.e., when ENABLE is set from logic low to logic high, the output capacitor is charged up with a limited current until the output voltage(VO) reaches 0.8 x VI. When the start-up comparator detects this voltage limit, the IC begins switching. This pre-charging of the output capacitor ensures a short start-up time.
PAGE 6
SLVS273− FEBRUARY 2000 low-battery detector (TPS60140 only) (continued) Formulas to calculate the resistive divider for low battery detection, with V(LBI) = 1.15 V to 1.27 V: R2 + 1 MΩ x V V LBI Bat (1) R1 + 1 MΩ – R2 (2) Formulas to calculate the minimum and maximum trip voltage: R1 V trip(min) +V trip(max) +V LBI(min) (min) R2 R1 V LBI(max) ) R2 (max) (max) (max) R2 (3) ) R2 (min) (min) (4) Table 1.
PAGE 7
SLVS273− FEBRUARY 2000 recommended operating conditions MIN Input voltage, VI 1.8 MAX UNIT 3.6 V Continuous output current, IOmax 100 mA Operating junction temperature, TJ 125 °C electrical characteristics at Ci = 4.7 µF, C1 = C2 = 2.
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SLVS273− FEBRUARY 2000 PARAMETER MEASUREMENT INFORMATION TPS6014x IN OUT OUT Ci 4.7 µF IN R1 LBI R2 Co 10 µF FB LBO C1+ C2+ C1 2.2 µF C2 2.2 µF C1− Used Capacitor Types: Ci, Co: Ceramic, X7R, Size 1206 C1, C2: Ceramic, X7R, Size 1206 C2− ENABLE OFF/ON PGND GND Figure 2.
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SLVS273− FEBRUARY 2000 TYPICAL CHARACTERISTICS EFFICIENCY vs OUTPUT CURRENT EFFICIENCY vs INPUT VOLTAGE 90 90 IO = 50 mA 80 80 VI = 2.4 V 70 Efficiency − % Efficiency − % VI = 2.0 V VI = 2.7 V 60 70 60 50 50 40 30 0.1 1 10 100 40 1.8 1000 2.0 2.2 2.4 IO − Output Current − mA Figure 3 3.0 3.2 3.4 3.6 OUTPUT VOLTAGE vs OUTPUT CURRENT 5.10 75 5.
PAGE 10
SLVS273− FEBRUARY 2000 TYPICAL CHARACTERISTICS OUTPUT VOLTAGE vs INPUT VOLTAGE OUTPUT VOLTAGE RIPPLE 5.10 5.25 IO = 1 mA 5.00 IO = 50 mA 4.95 VI = 2.4 V IO = 1 mA 5.20 VO − Output Voltage − V VO − Output Voltage − V 5.05 IO = 100 mA 4.90 5.15 5.10 5.05 5.00 4.95 4.85 4.90 4.80 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 4.85 3.
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SLVS273− FEBRUARY 2000 TYPICAL CHARACTERISTICS OUTPUT VOLTAGE RIPPLE AMPLITUDE vs OUTPUT CURRENT OUTPUT VOLTAGE RIPPLE AMPLITUDE vs INPUT VOLTAGE 60 Vpp − Output Voltage Ripple Amplitude − mV Vpp − Output Voltage Ripple Amplitude − mV 60 IO = 100 mA 50 40 30 IO = 10 mA 20 IO = 1 mA 10 0 1.8 VI = 2.4 V 50 40 30 20 10 0 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 0 3.
PAGE 12
SLVS273− FEBRUARY 2000 OUTPUT VOLTAGE vs TIME (START-UP TIMING) LINE TRANSIENT RESPONSE 6 IO = 50 mA 5 VI = 2.4 V IO = 100 mA 5 4 4 3 3 Enable 2 2 1 1 0 0 Enable Voltage − V 5.05 5.03 V I − Input Voltage − V 6 Out 5.07 VO − Output Voltage − V VO − Output Voltage − V TYPICAL CHARACTERISTICS 3.0 2.5 2.0 0 2 4 6 8 10 12 t − Time − ms 14 16 18 20 −1 −0.1 −1 0.0 0.1 0.2 0.3 0.4 0.5 0.
PAGE 13
SLVS273− FEBRUARY 2000 APPLICATION INFORMATION capacitor selection (continued) Table 2. Recommended Capacitor Values IO (mA) Ci (µF) C(xF) (µF) Co (µF) VPPTYP (mV) 0 − 50 4.7 2.2 4.7 40 0 − 100 4.7 2.2 10 40 0 − 100 4.7 2.2 22 18 If the measured output voltage ripple is too high for the application, improvements can be made. The first step is to increase the capacitance at the output.
PAGE 14
SLVS273− FEBRUARY 2000 APPLICATION INFORMATION power dissipation The power dissipated in the TPS6014x depends mainly on input voltage and output current and is described by the following: P (DISS) +I O ǒ3 x VI – VO Ǔ (5) By observation of the above equation, it can be seen that the power dissipation is worse for the highest input voltage VI and the highest output current IO. For an input voltage of 3.
PAGE 15
SLVS273− FEBRUARY 2000 APPLICATION INFORMATION layout and board space Careful board layout is necessary due to the high transient currents and switching frequency of the converter. All capacitors should be soldered in close proximity to the IC. Connect ground and power ground terminals through a short, low-impedance trace. A PCB layout proposal for a two-layer board is given in Figure 17.
PAGE 16
SLVS273− FEBRUARY 2000 APPLICATION INFORMATION related information application reports For more application information see: D PowerPAD Application Report, Literature Number SLMA002 D TPS6010x/TPS6011x Charge Pump Application Report, Literature Number SLVA070 device family products Other devices in this family are: 16 PART NUMBER DESCRIPTION TPS60100 Regulated 3.
PAGE 17
PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) TPS60140PWPR HTSSOP PWP 20 2000 330.0 16.4 TPS60141PWPR HTSSOP PWP 20 2000 330.0 16.4 Pack Materials-Page 1 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 6.95 7.1 1.6 8.0 16.0 Q1 6.95 7.1 1.6 8.0 16.
PAGE 19
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS60140PWPR HTSSOP PWP 20 2000 367.0 367.0 38.0 TPS60141PWPR HTSSOP PWP 20 2000 367.0 367.0 38.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46C and to discontinue any product or service per JESD48B. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.