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AP2101/AP2111
2A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Features
* * * * * * * * * * * * * * * * * Single USB port power switches with auto-discharge Short-circuit current and thermal protection 2.45A accurate current limiting Fast transient response time: 5s 90m on-resistance Reverse Current Blocking Input voltage range: 2.7V - 5.5V 0.6ms typical rise time Very low shutdown current: 1A (max) Fault report (FLG) with blanking time (7ms typ) ESD protection: 4KV HBM, 300V MM Active low (AP2101) or active high (AP2111) enable Ambient temperature range: -35C to 85C SOP-8L and MSOP-8L-EP (Exposed Pad): Available in "Green" Molding Compound (No Br, Sb) Lead Free Finish / RoHS Compliant (Note 1) UL Recognized, File Number E322375 (pending) IEC60950-1 CB Scheme Certified
Description
The AP2101 and AP2111 are integrated high-side power switches optimized for Universal Serial Bus (USB) and other hot-swap applications. The family of devices complies with USB 2.0 and available with both polarities of Enable input. They offer current and thermal limiting and short circuit protection as well as controlled rise time, under-voltage lockout and auto-discharge functionalities. A 7ms deglitch capability on the open-drain Flag output prevents false over-current reporting and does not require any external components. All devices are available in SOP-8L and MSOP-8L-EP packages.
Applications
* * * Consumer electronics - LCD TV & Monitor, Game Machines Communications - Set-Top-Box, GPS, Smartphone Computing - Laptop, Desktop, Servers, Printers, Docking Station, HUB
Typical Application Circuit
AP2111 Enable Active High
Power Supply 2.7V to 5.5V
10k 10uF 0.1uF FLG EN GND IN OUT 0.1uF
Load
120uF
ON OFF
Available Options Part Number AP2101 AP2111 Channel 1 1 Enable pin (EN) Active Low Active High Current limit (typical) 2.45A 2.45A Recommended maximum continuous load current 2.0A 2.0A
AP2101/AP2111 Rev. 1
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AP2101/AP2111
2A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Ordering Information
AP 21 X 1 XX G - X
Enable 0 : Active Low 1 : Active High Channel 1 : 1 Channel Package S : SOP-8L MP : MSOP-8L-EP Green G : Green Packing 13 : Tape & Reel
Device AP21X1SG-13 AP21X1MPG-13
Notes:
Package Code S MP
Packaging (Note 2) SOP-8L MSOP-8L-EP
13" Tape and Reel Quantity Part Number Suffix 2500/Tape & Reel -13 2500/Tape & Reel -13
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.
Pin Assignment
( Top View ) GND 1 IN IN EN
2 3 4 8 NC 7 6 5
( Top View ) GND IN IN
OUT FLG
1 2 3 4 8 7 6 5
NC OUT OUT FLG
OUT
EN
MSOP-8L-EP
SOP-8L
Pin Descriptions
Pin Name GND IN EN FLG OUT NC Pin Number 1 2, 3 4 5 6, 7 8 Ground Voltage input pin (all IN pins must be tied together externally) Enable input, active low (AP2101) or active high (AP2111) Over-current and over-temperature fault report; open-drain flag is active low when triggered Voltage output pin (all OUT pins must be tied together externally) No internal connection; recommend tie to OUT pins Descriptions
AP2101/AP2111 Rev. 1
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AP2101/AP2111
2A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Functional Block Diagram
IN
Current Sense UVLO Driver Current Limit Discharge Control
OUT
EN
FLG
Thermal Sense
Deglitch
GND
Absolute Maximum Ratings
Symbol ESD HBM ESD MM VIN VOUT VEN , VFLG Iload TJmax TST
Notes:
Parameter Human Body Model ESD Protection Machine Model ESD Protection Input Voltage Output Voltage Enable Voltage Maximum Continuous Load Current Maximum Junction Temperature Storage Temperature Range (Note 3)
Ratings 4 300 6.5 VIN + 0.3 6.5 Internal Limited 150 -65 to 150
Units KV V V V V A C C
3. UL Recognized Rating from -30C to 70C (Diodes qualified TST from -65C to 150C)
Recommended Operating Conditions
Symbol VIN IOUT TA Parameter Input voltage Output Current Operating Ambient Temperature Min 2.7 0 -35 Max 5.5 2.0 85 Units V A C
AP2101/AP2111 Rev. 1
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2A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Electrical Characteristics
(TA = 25C, VIN = +5.0V, unless otherwise stated) Symbol Parameter VUVLO ISHDN IQ ILEAK IREV Input UVLO Input Shutdown Current Input Quiescent Current Input Leakage Current Reverse Leakage Current Rload=1k Disabled, IOUT= 0 Enabled, IOUT= 0 Disabled, OUT grounded Disabled, VIN= 0V, VOUT= 5V, IREV at VIN VIN = 5V, IOUT= 1.5A TA = 25C MSOP8-EP SOP-8L -40C TA 85C VIN = 3.3V, IOUT= 1.5A TA = 25C -40C TA 85C ILIMIT ITrig ISHORT TSHORT VIL VIH ISINK TD(ON) TR TD(OFF) TF RFLG TBlank RDIS TSHDN THYS Over-Load Current Limit Current limiting trigger threshold Short-Circuit Current Limit Short-circuit Response Time EN Input Logic Low Voltage EN Input Logic High Voltage EN Input leakage Output turn-on delay time Output turn-on rise time Output turn-off delay time Output turn-off fall time VIN= 5V, VOUT= 4.5V, CL=120F Output Current Slew rate (<100A/s) , CL=100F Enabled into short circuit, CL=100F VOUT = 0V to IOUT = ILIMIT (short applied to output) VIN = 2.7V to 5.5V VIN = 2.7V to 5.5V VEN = 5V CL=1F, Rload=10 CL=1F, Rload=10 CL=1F, Rload=10 CL=1F, Rload=10 4 2.1 2.45 2.5 2.5 5 0.8 2 1 50 0.6 4 0.03 20 7 290 140 25 SOP-8L (Note 6) MSOP-8L-EP (Note 7) 110 60 0.1 40 15 1.5 115 0.05 90 95 115 115 140 140 170 2.8 A A A s V V A s ms s ms ms C C C/W C/W m
Test Conditions (Note 4)
Min 1.6
Typ. 1.9 0.5 45
Max 2.5 1 70 1
Unit V A A A A
RDS(ON)
Switch on-resistance
FLG output FET on-resistance IFLG =10mA, CL=100F FLG blanking time CIN=10F, CL=100F Discharge resistance (Note 5) VIN = 5V, disabled, IOUT= 1mA Thermal Shutdown Threshold Enabled, Rload=1k Thermal Shutdown Hysteresis Thermal Resistance Junction-to-Ambient
JA
Notes:
4. Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account separately. 5. The discharge function is active when the device is disabled (when enable is de-asserted). The discharge function offers a resistive discharge path for the external storage capacitor. This is suitable only to discharge filter capacitors for limited time and cannot dissipate steady state currents greater than 8mA. 6. Test condition for SOP-8L: Device mounted on FR-4, 2oz copper, with minimum recommended pad layout. 7. Test condition for MSOP-8L-EP: Device mounted on 2" x 2" FR-4 substrate PC board, 2oz copper, with minimum recommended pad on top layer and thermal vias to bottom layer ground plane.
AP2101/AP2111 Rev. 1
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2A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Typical Performance Characteristics
VEN
50%
50%
VEN TD(OFF) TF
50%
50%
TR TD(ON) VOUT
10% 90%
TR TD(ON) VOUT
10% 90%
TD(OFF) TF
90% 10%
90% 10%
Figure 1. Voltage Waveforms: AP2101 (left), AP2111 (right)
All Enable Plots are for AP2111 Active High Turn-On Delay and Rise Time Turn-Off Delay and Fall Time
Ven 5V/div
Ven 5V/div
Vout 2V/div CL=1uF TA=25C RL=5
Vout 2V/div
CL=1uF TA=25C RL=5
400us/div
400us/div
Turn-On Delay and Rise Time
Turn-Off Delay and Fall Time
Ven 5V/div
Ven 5V/div
Vout 2V/div CL=100uF TA=25C RL=5
Vout 2V/div
CL=100uF TA=25C RL=5
400us/div
400us/div
AP2101/AP2111 Rev. 1
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2A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Typical Performance Characteristics
Short Circuit Current, Device Enabled Into Short
Ven 5V/div
(Continued)
Inrush Current
Ven 5V/div
CL=100uF CL=470uF Iout 500mA/div VIN=5V TA=25C CL=100uF Iout 500mA/div CL=220uF VIN=5V TA=25C RL=2.5
500us/div 0.6 Load Connected to Enabled Device
VIN=5V TA=25C Vflag 5V/div CL=100uF Vout 5V/div
1ms/div Short Circuit with Blanking Time and Recovery
VIN=5V TA=25C CL=100uF
Vflag 5V/div
Iout 1A/div
Iout 2A/div
2ms/div Power On
Vflag 5V/div
50ms/div Power Off
TA=25C Vflag 5V/div CL=100uF RL=2.5
Iout 1A/div Iout 1A/div Vin 5V/div Vout 5V/div TA=25C CL=100uF RL=2.5
Vin 5V/div Vout 5V/div
1ms/div
10ms/div
AP2101/AP2111 Rev. 1
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2A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Typical Performance Characteristics
Device Enabled
(Continued)
Device Disabled
Vflag 5V/div VIN=5V Iout 1A/div
Vflag 5V/div
VIN=5V TA=25C CL=100uF RL=2.5
Iout 1A/div
TA=25C CL=100uF RL=2.5
Ven 5V/div
Ven 5V/div Vout 5V/div
Vout 5V/div
1ms/div UVLO Increasing
1ms/div UVLO Decreasing
TA=25C CL=100uF Vin 2V/div RL=2.5
Vin 2V/div
Iout 500mA/div
TA=25C CL=100uF RL=2.5
Iout 500mA/div
1ms/div
Turn-On Time vs Input Voltage
850
55
10ms/div
Turn-Off Time vs Input Voltage
750
50
CL=1uF RL=10 TA=25C
Turn-On Time (us)
650
Turn-Off Time (us)
5.5 6
45
550
40
450
CL=1uF RL=10 TA=25C
35
350
30
250 1.5 2 2.5 3 3.5 4 4.5 5
25 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
Input Voltage (V)
Input Voltage (V)
AP2101/AP2111 Rev. 1
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Typical Performance Characteristics
Rise Time vs Input Voltage
650 600 550
(Continued)
Fall Time vs Input Voltage
25
24
Rise Time (us)
500 450 400 350 300 2 2.5 3 3.5 4 4.5 5 5.5 6
Fall Time (us)
23
22
CL=1uF RL=10 TA=25C
21
CL=1uF RL=10 TA=25C
20
19 2 2.5 3 3.5 4 4.5 5 5.5 6
Input Voltage (V)
Input Voltage (V)
Supply Current, Output Enabled vs Ambient Temperature
52
0.9
Supply Current, Output Disabled vs Ambient Temperature
Supply Current, Output Disabled (uA)
Supply Current, Output Enabled (uA)
Vin=5.5V
0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0
Vin=5.0V
47
42
Vin=5.5V
Vin=3.3V
37
32
Vin=5.0V
Vin=3.3V
27 -60 -40 -20 0 20 40 60 80 100
-60
-40
-20
0
20
40
60
80
100
Ambient Temperature (C)
Ambient Temperature (C)
Static Drain-Source On-State Resistance vs Ambient Temperature
2.70
Short-Circuit Output Current vs Ambient Temperature
Short-Circuit Output Current (A)
140
Vin=3.3V
Static Drain-Source On-State Resistance (m)
130 120 110 100 90 80 70 -60 -40 -20 0 20 40 60 80 100
2.65 2.60 2.55 2.50
CL=120uF
Vin=3.3V
Vin=5.0V
2.45 2.40 2.35 2.30 -60 -40 -20 0 20 40 60 80 100
Vin=5.0V
Ambient Temperature (C)
Ambient Temperature (C)
AP2101/AP2111 Rev. 1
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2A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Typical Performance Characteristics
Undervoltage Lockout vs Ambient Temperature
2.15
(Continued)
Threshold Trip Current vs Input Voltage
3.24 3.22
Undervoltage Lockout (V)
2.10
UVLO Rising
Threshold Trip Current (A)
3.20 3.18 3.16 3.14 3.12 3.10
2.05
2.00
TA=25C CL=68uF
UVLO Falling
1.95
1.90 -60 -40 -20 0 20 40 60 80 100
3.08 2.8 3.3 3.8 4.3 4.8 5.3
Ambient Temperature (C)
Input Voltage (V)
Current Limit Response vs Peak Current
45 40
VIN=5V TA=25C
Current Limit Response (us)
35 30 25 20 15 10 5 0 0 2 4 6 8
10
12
Peak Current (A)
AP2101/AP2111 Rev. 1
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2A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Application Note
Power Supply Considerations
A 0.1-F to 1-F X7R or X5R ceramic bypass capacitor between IN and GND, close to the device, is recommended. Placing a high-value electrolytic capacitor on the input (10-F minimum) and output pin(s) is recommended when the output load is heavy. This precaution reduces power-supply transients that may cause ringing on the input. Additionally, bypassing the output with a 0.01-F to 0.1-F ceramic capacitor improves the immunity of the device to short-circuit transients.
Over-current and Short Circuit Protection
An internal sensing FET is employed to check for over-current conditions. Unlike current-sense resistors, sense FETs do not increase the series resistance of the current path. When an overcurrent condition is detected, the device maintains a constant output current and reduces the output voltage accordingly. Complete shutdown occurs only if the fault stays long enough to activate thermal limiting. Three possible overload conditions can occur. In the first condition, the output has been shorted to GND before the device is enabled or before VIN has been applied. The AP2101/AP2111 senses the short circuit and immediately clamps output current to a certain safe level namely ILIMIT. In the second condition, an output short or an overload occurs while the device is enabled. At the instance the overload occurs, higher current may flow for a very short period of time before the current limit function can react. After the current limit function has tripped (reached the over-current trip threshold), the device switches into current limiting mode and the current is clamped at ILIMIT. In the third condition, the load has been gradually increased beyond the recommended operating current. The current is permitted to rise until the current-limit threshold (ITRIG) is reached or until the thermal limit of the device is exceeded. The AP2101/AP2111 is capable of delivering current up to the current-limit threshold without damaging the device. Once the threshold has been reached, the device switches into its current limiting mode and is set at ILIMIT. To protect against short circuit to GND at extremely low temperature (< -30oC), a minimum 120-F electrolytic capacitor on the output pin is recommended. A correct capacitor type with capacitor voltage rating and temperature characteristics must be properly chosen so that capacitance value does not drop too low at the extremely low temperature operation. A recommended capacitor should have temperature characteristics of less than 10% variation of capacitance change when operated at extremely low temp. Our recommended aluminum electrolytic capacitor type is Panasonic FC series. At low input voltage condition (VIN < 3V), the short circuit protection current may rise as high as twice the typical value.
FLG Response
When an over-current or over-temperature shutdown condition is encountered, the FLG open-drain output goes active low after a nominal 7-ms deglitch timeout. The FLG output remains low until both over-current and over-temperature conditions are removed. Connecting a heavy capacitive load to the output of the device can cause a momentary over-current condition, which does not trigger the FLG due to the 7-ms deglitch timeout. The AP2101/AP2111 is designed to eliminate false over-current reporting without the need of external components to remove unwanted pulses.
Power Dissipation and Junction Temperature
The low on-resistance of the internal MOSFET allows the small surface-mount packages to pass large current. Using the maximum operating ambient temperature (TA) and RDS(ON), the power dissipation can be calculated by: 2 PD = RDS(ON)x I
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Application Note
(Continued)
Finally, calculate the junction temperature: TJ = PD x RJA + TA Where: TA= Ambient temperature C RJA = Thermal resistance PD = Total power dissipation
Thermal Protection
Thermal protection prevents the IC from damage when heavy-overload or short-circuit faults are present for extended periods of time. The AP2101/AP2111 implements a thermal sensing to monitor the operating junction temperature of the power distribution switch. Once the die temperature rises to approximately 140C due to excessive power dissipation in an over-current or short-circuit condition the internal thermal sense circuitry turns the power switch off, thus preventing the power switch from damage. Hysteresis is built into the thermal sense circuit allowing the device to cool down approximately 25C before the switch turns back on. The switch continues to cycle in this manner until the load fault or input power is removed. The FLG open-drain output is asserted when an over-temperature shutdown or over-current occurs with 7-ms deglitch.
Under-voltage Lockout (UVLO)
Under-voltage lockout function (UVLO) keeps the internal power switch from being turned on until the power supply has reached at least 1.9V, even if the switch is enabled. Whenever the input voltage falls below approximately 1.9V, the power switch is quickly turned off. This facilitates the design of hot-insertion systems where it is not possible to turn off the power switch before input power is removed.
Host/Self-Powered HUBs
Hosts and self-powered hubs (SPH) have a local power supply that powers the embedded functions and the downstream ports. This power supply must provide from 5.25V to 4.75V to the board side of the downstream connection under both full-load and no-load conditions. Hosts and SPHs are required to have current-limit protection and must report over-current conditions to the USB controller. Typical SPHs are desktop PCs, monitors, printers, and stand-alone hubs.
Generic Hot-Plug Applications
In many applications it may be necessary to remove modules or pc boards while the main unit is still operating. These are considered hot-plug applications. Such implementations require the control of current surges seen by the main power supply and the card being inserted. The most effective way to control these surges is to limit and slowly ramp the current and voltage being applied to the card, similar to the way in which a power supply normally turns on. Due to the controlled rise times and fall times of the AP2101/AP2111, these devices can be used to provide a softer start-up to devices being hot-plugged into a powered system. The UVLO feature of the AP2101/AP2111 also ensures that the switch is off after the card has been removed, and that the switch is off during the next insertion. By placing the AP2101/AP2111 between the VCC input and the rest of the circuitry, the input power reaches these devices first after insertion. The typical rise time of the switch is approximately 1ms, providing a slow voltage ramp at the output of the device. This implementation controls system surge current and provides a hot-plugging mechanism for any device.
AP2101/AP2111 Rev. 1
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AP2101/AP2111
2A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Marking Information
(1) SOP-8L
( Top view ) 8 Logo Part Number 0 : Active Low 1 : Active High 7 6 5 1 : 1 Channel G : Green YY : Year : 08, 09,10~ WW : Week : 01~52; 52 represents 52 and 53 week X : Internal Code 4
AP21X X
YY WW X X
1
2
3
(2) MSOP-8L-EP
( Top view ) 8 Logo Part Number 0 : Active Low 1 : Active High 1 7 6 5 A~Z : Green MSOP-8L-EP Y : Year : 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week 1 : 1 Channel
YWXE
AP21X X
2 3 4
AP2101/AP2111 Rev. 1
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2A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Package Information
(1) Package Type: SOP-8L
(All Dimensions in mm)
3.85/3.95
5.90/6.10
0.10/0.20
0.254 0.62/0.82
Gauge Plane Seating Plane
Detail "A"
7~9 1.30/1.50 1.75max. 0.15/0.25
0.35max. 45
7~9
Detail "A"
0/8
1.27typ 4.85/4.95
0.3/0.5
8x-0.60 5.4 6x-1.27 8x-1.55
Land Pattern Recommendation (Unit: mm)
(2) Package Type: MSOP-8L-EP
8x-0.45 2.9/3.1 4.7/5.1 4.4 6x-0.65 1 0.75/0.95 1.10Max. 0.15Typ. 0.65Bsc. 0.22/0.38 8x-1.4 1
EXPOSED PAD (BOTTOM)
Land Pattern Recommendation (Unit:mm) "A"
1
EXPOSED PAD (BOTTOM) 0.05/0.15 0.4/0.8 0.95Ref. DETAIL "A"
0.25 Gauge plane
0/8
0.05 2.9/3.1
1.65/1.95
1.35/1.65
AP2101/AP2111 Rev. 1
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AP2101/AP2111
2A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright (c) 2009, Diodes Incorporated www.diodes.com
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