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Description of the EVM

The Texas Instruments TPS60210 charge pump is a regulated voltage dou-
bler. The TPS60210 delivers 3.3-V output voltage (V

O

) from a 1.8-V to 3.6-V

input voltage (V

I

). The output current (I

O

) is 100 mA minimum, for an input volt-

age (V

I

) of 2.0 V or higher.

For output currents below 2 mA, the device can be operated in the snooze
mode (SNOOZE = 0). This is an operating mode, where the quiescent current
is drastically reduced. In this mode, V

O

 is regulated to 3.3 V 

±

6%. The low

quiescent current is achieved by disabling most of the internal circuitry as long
as V

O

 is high enough. When V

O

 decreases, the device operates for a short pe-

riod of time in normal mode, to boost V

O

. The internal circuitry is then disabled

again. This reduces the quiescent current to a typical value of only 2 

µ

A. If the

device is programmed to operate in snooze mode and the I

O

 increases above

2 mA, the device enters the startup mode to increase V

O

.

Additionally, the TPS60210 has a low battery detector (LBI input and LBO
output). The trip voltage of the LBI input is typically 1.18 V. The TPS60210 can
be programmed with an external resistive divider to the specific trip voltage for
the application. On the EVM, the resistive divider on the LBI input is connected
to V

I

 and the trip voltage is set to 2.0 V, typically. The LBO output is an

open-drain output and is in a high-impedance state as long as the voltage at
LBI is above the trip voltage. A 1-M

 pullup resistor to V

O

 is added on the EVM

to get a defined high signal as long as the voltage at LBI is above the trip
voltage.

For simple evaluation, a 1-M

 resistor between V

I

 and the SNOOZE pin is

added to operate the TPS60210 in normal mode.

A minimum of four external capacitors for a push-pull voltage doubler charge
pump are required. The EVM is built with these four capacitors. For evaluation,
it is possible to use other capacitor values like those given in the application
section of the TPS6021x data sheet (literature number SLVS296). The capaci-
tors on the EVM are ceramic capacitors. The ESR of all other capacitor types
is too high to get good performance.

Chapter 1

Summary of Contents for TPS6021 Series

Page 1: ... August 2000 Power Management Products User s Guide 查询SLVU030供应商 捷多邦 专业PCB打样工厂 24小时加急出货 ...

Page 2: ... this warranty Specific testing of all parameters of each device is not necessarily performed except those mandated by government requirements Customers are responsible for their applications using TI components In order to minimize risks associated with the customer s applications adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards ...

Page 3: ...her devices of the TPS6021x family How to Use This Manual For more information about the EVM please read Chapter 1 Description of the EVM Chapter 2 includes the Physical Data and the Setup of the EVM Related Documentation From Texas Instruments Data sheet of TPS60210 TPS60211 TPS60212 TPS60213 literature number SLVS296 Erich Bayer Alexander Müller Hans Schmeller and Günter Sporer Charge Pump Techn...

Page 4: ......

Page 5: ...ayout of the EVM 2 4 2 3 Setup of the EVM 2 5 2 4 Evaluation Information 2 6 Figures 2 1 Schematic of the EVM 2 2 2 2 Placement of the Components 2 4 2 3 Single Layer of the EVM 2 4 2 4 Actual Size of the EVM 17 9 mm 10 2 mm 2 4 Tables 2 1 Bill of Material for the TPS60210 EVM 2 2 2 2 Pin Assignment of the Board to a 14 Pin Dual In Line Socket 2 5 ...

Page 6: ......

Page 7: ...210 has a low battery detector LBI input and LBO output The trip voltage of the LBI input is typically 1 18 V The TPS60210 can be programmed with an external resistive divider to the specific trip voltage for the application On the EVM the resistive divider on the LBI input is connected to VI and the trip voltage is set to 2 0 V typically The LBO output is an open drain output and is in a high imp...

Page 8: ...uit For the TPS60211 and TPS60213 the LBI resistors should be removed and LBI connected to GND The LBO pullup resistor works as power good PG pullup and the LBO pad gives the PG signal Free samples of the other parts of the TPS6021x family can be ordered from http www ti com Use the SC Part Number Search to go to the product folder of the specific device ...

Page 9: ...layout and setup of the EVM The layout of a charge pump circuit is critical therefore the given layout can be used as a reference and helps to reduce design and evaluation time Topic Page 2 1 Schematic of the EVM 2 2 2 2 Layout of the EVM 2 4 2 3 Setup of the EVM 2 5 2 4 Evaluation Information 2 6 Chapter 2 ...

Page 10: ... MΩ Pullup for the open drain output LBO R4 1 MΩ Pullup for the SNOOZE input Table 2 1 contains the bill of material of the TPS60210EVM 167 The follow ing paragraph describes the use of some of the parts R1 and R2 adjust the input voltage of the LBI input for low battery detection The resistive divider on the EVM is connected to VI For the given resistor val ues the LBO signal will go active low i...

Page 11: ...esistors must be removed For operation with the internal oscillator connect the SNOOZE signal to either the input voltage like on the EVM or a logic high level respectively or to a low level for operation in snooze mode The device can also be synchronized with an external oscillator signal For synchronization to an external oscillator sig nal the SNOOZE pin must be connected to this signal When th...

Page 12: ... C3 C4 R2 C5 R3 R4 R1 IC1 Figure 2 3 Single Layer of the EVM Figure 2 4 Actual Size of the EVM 17 9 mm 10 2 mm Table 2 1 contains the values and description of the five capacitors and the four resistors that are placed on the EVM The EVM is built to fit into a 14 pin dual in line socket However not all 14 pins are used Only pins 1 to 3 7 8 and 12 to 14 of a dual in line socket are used Table 2 2 s...

Page 13: ...tup of the EVM Follow these steps for proper operation of the EVM 1 Connect a load to the output between GND and OUT 33 Ω or 0 mA to 100 mA for 2 0 V VI 3 6 V 66 Ω or 0 mA to 50 mA for 1 8 V VI 2 V 132 Ω or 0 mA to 25 mA for 1 6 V VI 1 8 V Note Start up only with resistive load not with a current sink 2 Connect a dc power supply or a battery pack with an appropriate voltage between input IN and gr...

Page 14: ...ion from high to low at LBO will occur Trip voltages other than 2 V can be adjusted by replacing the LBI resistive divider with the appropriate resistors For the correct resistor values for different trip voltages please refer to the TPS6021x data sheet literature number SLVS296 It is also possible to evaluate several different capacitors on the EVM A capacitor selection list with the measured out...

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