AAT3125ISN-T1

AAT3125 ANALOGICTECH

Document overview

• Manufacturer or author: janekim
• PDF pages: 12

Technical content

Features

• V IN Range: 2.7V to 5.5V
• Regulated Fractional Charge Pump
• 100mA Output Current
• Reverse Load Protection
• Power Good Flag
• SRP Detection Flag
• SRP Ready Flag
• Output Short-Circuit and Thermal Protection
• Under-Voltage Protection
• Less than 1µA Consumed While Disabled
• Designed to Allow Operation with Output Capacitance as Low as 3.3µF
• 16-pin QFN44 Package
• -40°C to +85°C Temperature Range

Applications

• Cell Phones
• Hand-Held Computers
• PDAs Typical Application IN POK1 GND SR OUT COUT CIN 1µF 1µF 1µF 1µF 3.3µF to 6.5µF SR POK2 SESDET SRRDY ENEN R1 R2 R3 R4 POK1 VBUS POK2 SESDET SRRDY AAT31251 Cell Li-Ion C1+ C1- C2+ C2- 80kΩ CCP OUTCP RCS 0.2Ω ChargePump™

(Top View) POK1 POK2 SESDET SRRDY OUT C1+ C1- N/C OUTCP C2+ C2- GND N/C VIN SR EN Pin # Symbol Function 1 POK1 Power OK 1. Open drain output with 4.0V voltage detector. When the OUT pin rises above the detected voltage (4.0V), POK1 will transition from low to high state. Similarly, when the output falls below 4.0V, POK1 will transition from high to low. A 10kΩ pull-up resistor is recommended. 2 POK2 Power OK 2. Open drain output with 4.4V voltage detector. When the OUT pin rises above the detected voltage (4.4V), POK2 will transition from low to high state. Similarly, when the output falls below 4.4V, POK2 will transition from high to low. A 10kΩ pull-up resistor is recommended. 3 SESDET Session detect. Open drain output with 2.0V voltage detector. When the OUT pin rises above the detected voltage (2.0V), it will transition from low to high state. Similarly, when the output falls below 2.0V, SESDET will transition from high to low. A 10kΩ pull-up resistor is recommended. 4 SRRDY Session request ready. Open drain output with 0.6V voltage detector. When the OUT pin rises above the detected voltage (0.6V), it will transition from low to high state. Similarly, when the output falls below 0.6V, SRRDY will transition from high to low. A 10kΩ pull-up resistor is rec- ommended. 5 OUT Power output to VBUS. 6 C1+ Flying capacitor 1 positive terminal. 7 C1- Flying capacitor 1 negative terminal. 8, 13 N/C No connect. 9 OUTCP Charge pump output. Requires 1µF bypass capacitor to ground. 10 C2+ Flying capacitor 2 positive terminal. 11 C2- Flying capacitor 2 negative terminal. 12 GND Ground. 14 VIN Input power supply. Requires 1µF bypass capacitor to ground. 15 SR Session request input control pin. Should not be left floating. Must connect to high or low. For more details, see Table 1. 16 EN Enable input control pin. When in the low state, the AAT3125 is powered down and consumes a small amount of power. When connected high, it is in normal operation. This pin should not be left floating. For more details, see Table 1. EP Exposed paddle (bottom); connect to GND directly beneath package. AAT3125 USB OTG 5V Charge Pump 2 3125.2005.12.1.4

3125.2005.12.1.4 3 Absolute Maximum Ratings1 Thermal Information Symbol Description Value Units θJA Maximum Thermal Resistance4 50 °C/W PD Maximum Power Dissipation (TA = 25°C)5 2.0 W Symbol Description Value Units VIN, VOUT Any Pin to GND -0.3 to 6 V tSC OUT Short-Circuit Duration Indefinite s IOUT

2 Output Current 150 mA

TJ Operating Temperature Range -40 to 85 °C TS Storage Temperature Range -65 to 150 °C VESD ESD Rating3 - HBM 2000 V 1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at condi- tions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time. 2. Based on long-term current density limitation. 3. Human body model is a 100pF capacitor discharged through a 1.5k Ω resistor into each pin. 4. Mounted on an FR4 board. 5. Derate 20mW/°C above 25°C.

4 3125.2005.12.1.4 Electrical Characteristics1 VIN = 3.5V; CIN = COUT = C1 = C2 = 1.0µF; TA = -40°C to +85°C. Unless otherwise noted, typical values are T A = 25°C. Symbol Description Conditions Min Typ Max Units Input Power Supply VIN Operating Range 2.9 5.5 V Icc3 Operating Current SRP EN = 1, SR = 1, OUT = IN 60 110 µA Icc2 Operating Current CP EN = 1, SR = 0 1 3 mA Icc1 Shutdown Current 1 EN = 0, SR = 1 1 2 µA Icc0 Shutdown Current 0 EN = 0, SR = 0 1 µA Output Power Supply VOUT Output Regulation I OUT = 0 4.6 5.25 V ICCOUT Operating Current EN = 0 7 12 µA VCS Current Sense Trip Level VCS = I OUT x RCS 40 60 90 mV ROFF Pull-Down Resistance EN = 0, SR = 1 700 1000 1500 Ω ISR SR Current Pulse OUT < (IN-1.0v) 5 10 20 mA Charge Pump η Efficiency V IN = 3.75V, IOUT = 50mA 90 % TSS Soft-Start Time OUT < 0.1 to OUT > 4.4 100 µs FCLK Clock Frequency 750 kHz EN, SR VIL Input Threshold Low 0.4 V VIH Input Threshold High 1.4 V IEN(SINK) EN Input Current V IN = VEN = 5.5V -1 1 µA ISR(SINK) SR Input Current V IN = VSR = 5.5V -1 1 µA POK1 VPOK1 POK Trip Threshold V OUT Rising 3.8 4.0 4.2 V VPOK1(HYS) POK Hysteresis 50 mV VPOK1(OL) POK Output Voltage I SINK = 1mA 0.3 V IPOK1 POK Leakage Current V POK = 5.5, 25°C 100 nA POK2 VPOK2 POK Trip Threshold V OUT Rising 4.18 4.4 4.62 V VPOK2(HYS) POK Hysteresis 50 mV VPOK2(OL) POK Output Voltage I SINK = 1mA 0.3 V IPOK2 POK Leakage Current V POK = 5.5, 25°C 100 nA 1. The AAT3125 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assu red by design, characterization, and correlation with statistical process controls.

Electrical Characteristics1 VIN = 3.5V; CIN = COUT = C1 = C2 = 1.0µF; TA = -40°C to +85°C. Unless otherwise noted, typical values are T A = 25°C. Table 1: Operational States. Charge Current Discharge EN SR Pump Source SRRDY POK SESDET Resistor 1 0 ON OFF ON ON ON OFF 1 1 OFF ON ON ON ON OFF 0 0 OFF OFF OFF OFF ON OFF 0 1 OFF OFF OFF OFF ON ON Symbol Description Conditions Min Typ Max Units SESDET VSD SD Trip Threshold V OUT Rising 1.9 2.0 2.1 V VSD(HYS) SD Hysteresis 50 mV VSD(OL) SD Output Voltage I SINK = 1mA 0.3 V ISD SD Leakage Current V SD = 5.5, 25°C 100 nA SRRDY VSRRDY SRRDY Trip Threshold V OUT Rising 0.4 0.6 0.8 V VSRRDY(HYS) SRRDY Hysteresis 20 mV VSRRDY(OL) SRRDY Output Voltage I SINK = 1mA 0.3 V ISRRDY SRRDY Leakage Current V SRRDY = 5.5, 25°C 100 nA AAT3125 USB OTG 5V Charge Pump 3125.2005.12.1.4 5 1. The AAT3125 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assu red by design, characterization, and correlation with statistical process controls.

6 3125.2005.12.1.4 Typical Characteristics Unless otherwise noted, VIN = 3.5V, CIN = COUT = C1 = C2 = 1µF, TA = 25°C. Charge Pump Output Voltage vs. Input Voltage (ILOAD = 100mA) 012345 Input Voltage (V) Output Voltage (V) Charge Pump Output Voltage vs. Load Current 4.5 4.7 4.9 5.1 5.3 5.5 1 10 100 1000 Load Current (mA) Charge Pump Output Voltage (V) VIN = 3.9V VIN = 3.7V Load Transient Response (10mA to 100mA) Time (4ms/div) VOUT (100mV/div) Charge Pump Waveforms (100mA load) Time (1 µs/div) V (10mV/div) IN OUT Efficiency vs. Load Current 100 1 10 100 1000 Load Current (mA) Efficiency (%) VIN = 3.8V VIN = 3.4V Charge Pump ON/OFF Timing Time (2ms/div) OUT (1V/div) IIN (100mA/div) EN (1V/div)

3125.2005.12.1.4 7 Typical Characteristics Unless otherwise noted, VIN = 3.5V, CIN = COUT = C1 = C2 = 1µF, TA = 25°C. Charge Pump POK Timing Time (100µs/div) OUT (5V/div) EN (2V/div) POK2 (5V/div) POK1 (5V/div) SESDET (5V/div) SRRDY (5V/div) ISR vs. VOUT (EN = 1; SR = 1) 01 2 34 Output Voltage (V) ISR (mA) VIN = 4.2V VIN = 3.2V ICCOUT vs. VOUT 01 23456 Output Voltage (V) ICCOUT (µA) Shutdown Current vs. Input Voltage (EN = 0; SR = 1) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0123456 Input Voltage (V) ICC1 (µA) Operating Current vs. Input Voltage (EN = 1; SR = 0; Outside Current Source Mode) 012345 Input Voltage (V) ICC3 (µA) Operating Current vs. Input Voltage (EN = 1; SR = 0; Charge Pump Mode) 0.000 0.200 0.400 0.600 0.800 1.000 1.200 01 23456 Input Voltage (V) ICC2 (mA)

8 3125.2005.12.1.4 Typical Characteristics Unless otherwise noted, VIN = 3.5V, CIN = COUT = C1 = C2 = 1µF, TA = 25°C. VBUS Pulsing for SRP (VBUS Rise Time; 100µµF on VBUS) Time (10ms/div) VBUS (V) VBUS Pulsing for SRP (VBUS Rise Time; 5µµF on VBUS) Time (1ms/div) VBUS (V) Rising SESDET, SRRDY Timing (120µF Load) Time (10ms/div) OUT (5V/div) EN, SR (5V/div) SESDET (5V/div) SRRDY (5V/div) Falling SESDET Timing Time (100ms/div) OUT (5V/div) EN/SR (5V/div) SESDET (5V/div)

3125.2005.12.1.4 9 Functional Block Diagram Voltage Reference Control UVLO OTMP IN POK1 GND SR OUTCP 10mA EN 4.0 POK2 4.4 SESDET 2.0 SRRDY 0.6 5V Charge Pump C1+ C1- C2+ C2- OUT OC Functional Description Charge Pump The AAT3125 charge pump uses a 1.5X topology; the two flying capacitors are charged in series and discharged in parallel. Using this topology, output current is approximately 2/3 input current. Since the power bus in battery-operated devices that use a single cell lithium-ion/polymer battery ranges from 3V to 4.5V, an output voltage above 4.4V can be maintained. Output voltage is regulated to 5V and output current is limited by the value of R CS. The charge pump is designed to operate safely with any combination of input and output voltages. Current is not allowed to flow from OUT to IN. 10mA Current Source A 10mA current source supplies current to OUT for V BUS pulsing during SRP. During VBUS pulsing, the length of time needed to charge capacitance con- nected to OUT distinguishes between non-SRP capable devices and SRP capable devices. Using 10mA, SESDET should rise about 7ms after SRRDY rises when an OTG device is connected. With a non-OTG device connected, this period is at least 70ms. 10mA should not damage non-SRP capable hosts that allow reverse current flow from the bus. Current is not allowed to flow from OUT to IN through the current source. SESDET MicroPower Voltage Detector The SESDET open drain output signals the use of SRP while the system is acting as the A device. OUT powers this detector because the local 5V bus may not be powered when the B device initi- ates SRP. Since V BUS provides no more than 150µA to OUT, the detector consumes only 7µA. SRRDY Voltage Detector The SRRDY open drain output signals that VBUS is ready for SRP. SRRDY is powered by IN and is active as long as IN is above the UVLO level. SRRDY is true (low) when OUT is below the SRRDY threshold (0.6V nominal). SRRDY is false

10 3125.2005.12.1.4 (open) when OUT is above the SRRDY threshold or when EN is a logic low. Upon activation by EN, there is no negative glitch that can be mistaken for OUT below 0.8V. Power OK USB OTG devices connected as Host must main- tain V OUT above 4.4 volts or report that it is below 4.4 volts. Two Power OK outputs (POK1 and POK2) provide a window comparison of the V OUT voltage. The POK1 open drain output is pulled low if V OUT drops below 4.0V ± 5%, and the POK2 open drain output is pulled low if V OUT drops below 4.4V ± 5%. Under-Voltage Lockout Circuits other than the MicroPower voltage detector (SESDET) require voltage to be present on IN. Under-voltage lockout guarantees that sufficient voltage is present on IN to ensure operation. All functions other than the SESDET flag are disabled if the voltage on IN is less than 2V. Discharge Resistor In accordance with the USB OTG specification, a pull-down resistor is provided to discharge V BUS at a current of not more than 8mA. Over-Temperature Protection If the AAT3125 junction temperature exceeds 125°C, the charge pump is shut down.

Ordering Information

Package Information

All dimensions in millimeters. 4.000 ± 0.050 Pin 1 Dot By Marking 2.400 ± 0.050 0.600 ± 0.050 4.000 ± 0.050 2.280 REF

0.650 BSC

0.900 ± 0.050 Pin 1 Identification R0.030Max 13 16 0.450 ± 0.050 0.0125 ± 0.0125 0.203 ± 0.025 0.330 ± 0.050 Top View Bottom View Side View All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means semiconductor products that are in compliance with current RoHS standards, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. For more information, please visit our website at http://www.analogictech.com/pbfree. Package Marking 1 Part Number (Tape and Reel)2 QFN44-16 ITXYY AAT3125ISN-T1 AAT3125 USB OTG 5V Charge Pump 3125.2005.12.1.4 11 1. XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD.

12 3125.2005.12.1.4 Advanced Analogic Technologies, Inc. 830 E. Arques Avenue, Sunnyvale, CA 94085 Phone (408) 737-4600 Fax (408) 737-4611 © Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice. Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. AnalogicTech warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with AnalogicTech’s standard warranty. Testing and other quality con- trol techniques are utilized to the extent AnalogicTech deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed.