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AP2145/AP2155
0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Features
* * * * * * * * * * * * * * * Single USB port power switches Over-current and thermal protection 0.8A accurate current limiting Reverse Current Blocking 90m on-resistance Input voltage range: 2.7V - 5.5V 0.6ms typical rise time Very low shutdown current: 1uA (max) Fault report (FLG) with blanking time (7ms typ) ESD protection: 6KV HBM, 400V MM Active high (AP2155) or active low (AP2145) enable Ambient temperature range -40C 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 AP2145 and AP2155 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 and under-voltage lockout functionality. 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
AP2155 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 AP2145 AP2155 Channel 1 1 Enable pin (EN) Active Low Active High Current limit (typical) 0.8A 0.8A Recommended maximum continuous load current 0.5A 0.5A
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0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Ordering Information
AP 21 X 5 XX G - 13
Enable 4 : Active Low 5 : Active High Channel 5 : 1 Channel Package S : SOP-8L MP : MSOP-8L-EP Green G : Green Packing 13 : Tape & Reel
Device AP21X5SG-13 AP21X5MPG-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 )
( Top View )
EN FLG GND NC
1 2 3 4 8 7 6 5
OUT IN OUT NC
EN FLG GND NC
1 2 3 4
8 7 6 5
OUT IN OUT NC
MSOP-8L-EP
SOP-8L
Pin Descriptions
Pin Name EN FLG GND NC OUT IN Pin Number 1 2 3 4, 5 6, 8 7 Descriptions Enable input, active low (AP2145) or active high (AP2155) Over-current and over-temperature fault report; open-drain flag is active low when triggered Ground No internal connection Voltage output pin (all OUT pins must be tied together externally) Voltage input pin
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AP2145/AP2155
0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Functional Block Diagram
AP2145, AP2155
IN
Current Sense
OUT
UVLO Driver Current Limit
EN
FLG
Thermal Sense
Deglitch
GND
Absolute Maximum Ratings
Symbol ESD HBM ESD MM VIN VOUT VEN , VFLG Iload TJmax TST 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 Ratings 6 400 6.5 VIN + 0.3 6.5 Internal Limited 150 -65 ~ 150 Units KV V V V V A C C
Recommended Operating Conditions
Symbol VIN IOUT TA Parameter Input voltage Output Current Operating Ambient Temperature Min 2.7 0 -40 Max 5.5 500 85 Units V mA C
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0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Electrical Characteristics
(TA = 25oC, 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, OUT = open Enabled, OUT = open Disabled, OUT grounded Disabled, VIN= 0V, VOUT= 5V, IREV at VIN VIN = 5V, IOUT= 0.5A, -40oC TA 85oC
o
Test Conditions
Min 1.6
Typ. 1.9 0.5 45
Max 2.5 1 70 1
Unit V A A A A m m m A
-1 1 90 95
o
MSOP-8L-EP SOP-8L
140 140 160
RDS(ON)
Switch on-resistance
VIN = 3.3V, IOUT= 0.5A, -40 C TA 85 C ISHORT ILIMIT ITrig TSHORT VIL VIH ISINK IO-LEAK TD(ON) TR TD(OFF) TF RFLG IFLG TBlank TSHDN THYS Short-Circuit Current Limit Over-Load Current Limit Current limiting trigger threshold Short-Circuit Response Time EN Input Logic Low Voltage EN Input Logic High Voltage EN Input leakage Output Leakage Current Output turn-on delay time Output turn-on rise time Output turn-off delay time Output turn-off fall time FLG Leakage Current FLG blanking time Thermal Shutdown Hysteresis Thermal Resistance Junction-to-Ambient SOP-8L (Note 3) MSOP-8L-EP (Note 4) Enabled into short circuit, CIN=10F, CL=100F VIN= 5V, VOUT= 4.5V, CIN=10F, CL=100F, o o -40 C TA 85 C Output Current Slew rate (<100A/s), CIN=10F, CL=22F VOUT = 0V to IOUT = ILIMIT (short applied to output), CL=100F VIN = 2.7V to 5.5V VIN = 2.7V to 5.5V VEN = 5V Disabled CL=1F, Rload=10 CL=1F, Rload=10 CL=1F, Rload=10 CL=1F, Rload=10 VFLG = 5V VIN = 3.3V or 5V, CIN=10F, CL=100F 4 2 0.6
120 0.7 0.8 1.0 10
1.0
A A s
0.8 1 1 0.05 0.6 0.01 0.05 20 1 7 135 25 110 60
o o
V V A A ms ms ms ms A ms C C C/W C/W
1.5 0.1 40 15
FLG output FET on-resistance VIN = 3.3V or 5V, CIN=10F, IFLG =10mA
Thermal Shutdown Threshold Enabled, Rload=1k
JA
Notes:
3. Test condition for SOP-8L: Device mounted on FR-4, 2oz copper, with minimum recommended pad layout. 4. 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.
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0.5A 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: AP2145 (left), AP2155 (right)
All Enable Plots are for AP2155 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=10
Vout 2V/div
CL=1uF TA=25C RL=10
500us/div
500us/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=10
Vout 2V/div CL=100uF TA=25C RL=10
500us/div
500us/div
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AP2145/AP2155
0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Typical Performance Characteristics
Short Circuit Current, Device Enabled Into Short
(Continued)
Inrush Current
CL=100uF
Ven 5V/div Ven 5V/div VIN=5V TA=25C RL=10
Iout 200mA/div VIN=5V TA=25C CL=100uF
Iin 200mA/div CL=220uF
CL=470uF
500us/div 3 Load Connected to Enabled Device
VIN=5V TA=25C CL=100uF
1ms/div 2 Load Connected to Enabled Device
VIN=5V TA=25C CL=100uF
Vflag 2V/div
Vflag 2V/div
Iout 500mA/div
Iout 500mA/div
2ms/div
2ms/div
Short Circuit with Blanking Time and Recovery
Vout 5V/div Vflag 5V/div
Power On
Vflag 5V/div VIN=5V TA=25C CL=100uF Iout 1A/div Iout 200mA/div Vin 5V/div Vout 5V/div
TA=25C CL=100uF RL=10
50ms/div
1ms/div
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Vout
AP2145/AP2155
0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Typical Performance Characteristics
Power Off
TA=25C CL=100uF RL=10
(Continued)
Device Enabled
Vflag 5V/div
Vflag 5V/div
Iout 200mA/div
Iout 200mA/div Ven 5V/div Vout 5V/div TA=25C CL=100uF RL=10
Vin 5V/div Vout 5V/div
10ms/div
1ms/div
Device Disabled
UVLO Increasing
Vflag 5V/div
TA=25C CL=100uF RL=10
Vin 2V/div
TA=25C CL=100uF RL=10
Iout 200mA/div
Ven 5V/div Vout 5V/div
Iout 200mA/div
1ms/div
1ms/div
UVLO Decreasing
TA=25C CL=100uF RL=10 Vin 2V/div
Iout 200mA/div
10ms/div
AP2145/AP2155 Rev. 1
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0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Typical Performance Characteristics
Turn-On Time vs Input Voltage
800 700 600 500 400 300 200 100 0 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
(Continued)
Turn-Off Time vs Input Voltage
31 31
Turn-On Time (us)
Turn-Off Time (us)
30 30 29 29 28 28 1.5 2 2.5 3 3.5 4 4.5
CL=1uF RL=10 TA=25C
CL=1uF RL=10 TA=25C
5
5.5
6
Input Voltage (V)
Input Voltage (V)
Rise Time vs Input Voltage
600 25
Fall Time vs Input Voltage
500
24
Rise Time (us)
Fall Time (us)
400
23
300
22
200
CL=1uF RL=10 TA=25C
21
CL=1uF RL=10 TA=25C
100
20
0 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
19 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
Input Voltage (V)
Input Voltage (V)
Supply Current, Output Disabled vs Ambient Temperature
1.60
Supply Current, Output Disabled (uA)
1.40 1.20 1.00 0.80
Vin=5.5V
Vin=5.5V
Vin=5.0V
Vin=5.0V
Vin=3.3V
0.60
Vin=2.7V
0.40 0.20 0.00 -45 -25 -5 15 35 55 75 95
Vin=3.3V
Ambient Temperature (C)
AP2145/AP2155 Rev. 1
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0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Typical Performance Characteristics
Static Drain-Source On-State Resistance vs Ambient Temperature
(Continued)
Short-Circuit Output Current vs Ambient Temperature
750
145
Vin=3.3V
Static Drain-Source On-State Resistance (m)
135 125 115 105 95 85 75 65 -60 -40 -20 0 20 40 60 80 100
Short-Circuit Output Current (A)
745
Vin=3.3V
740
735
730
Vin=5V
725
Vin=5V
720 -60 -40 -20 0 20 40 60 80 100
Ambient Temperature (C)
Ambient Temperature (C)
Undervoltage Lockout vs Ambient Temperature
2.05 2.04
1.15
Threshold Trip Current vs Input Voltage
UVLO Rising
Threshold Trip Current (A)
1.14
Undervoltage Lockout (V)
2.03 2.02 2.01 2.00 1.99 1.98 1.97 1.96 1.95 -60 -40 -20 0 20 40 60 80 100
1.13
1.12
UVLO Falling
TA=25C
1.11
CL=22uF
1.10 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
Current Limit Response (us)
35 30 25 20 15 10 5 0 2 3 4 5 6 7 8 9 10
VIN=5V TA=25C CL=22uF
Peak Current (A)
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0.5A 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 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 AP2145/AP2155 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 AP2145/AP2155 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. 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 AP2145/AP2155 is designed to eliminate false over-current reporting without the need of external components to remove unwanted pulses.
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Application Note
(Continued)
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: PD = RDS(ON)x I2 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 AP2145/AP2155 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.
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 AP2145/AP2155, 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 AP2145/AP2155 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 AP2145/AP2155 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.
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0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Marking Information
(1) SOP-8L
( Top view ) 8 Logo Part Number 4 : Active Low 5 : Active High 7 6 5 5 : 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 4 : Active Low 5 : 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 5 : 1 Channel
YWXE
AP21X X
2 3 4
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0.5A 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
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0.5A 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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