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What is APW7138?

This electronic component, produced by the manufacturer "ANPEC", performs the same function as "High-Performance Notebook PWM Controller".


APW7138 Datasheet PDF - ANPEC

Part Number APW7138
Description High-Performance Notebook PWM Controller
Manufacturers ANPEC 
Logo ANPEC Logo 


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APW7138
High-Performance Notebook PWM Controller
Features
General Description
Adjustable Output Voltage from +0.6V to +3.3V
The APW7138 is a single-phase, constant-on-time, and
- 0.6V Reference Voltage
synchronous PWM controller which drives N-channel
- ±1% Accuracy Over Temperature
MOSFETs. The APW7138 steps down high voltage of a
Operates from an Input Battery Voltage Range of battery to generate low-voltage chipset or RAM supplies
+3V to +25V
in notebook computers.
Wide Output Load Range from 0A to 25A
The APW7138 provides excellent transient response and
Power-On-Reset Monitoring on VCC Pin
accurate DC voltage output in either PFM or PWM Mode.
Excellent Line and Load Transient Response
In Pulse Frequency Modulation (PFM) Mode, the APW7138
PFM Mode for Increased Light Load Efficiency
provides very high efficiency over light load with loading-
Programmable PWM Frequency from 200kHz to modulated switching frequencies. When the inductor
600kHz
Integrated MOSFET Drivers and Bootstrap Diode
Internal Integrated Soft-Start and Soft-Stop
Selectable Forced PWM or Automatic PFM/PWM
current is continuous, the operation automatically enters
PWM mode with relatively constant switching frequency.
For QFN4x4-16A and TQFN3x3-16 packages, the Forced-
PWM Mode works nearly at constant frequency for low-
Mode (only for QFN4x4-16A and TQFN3x3-16
Packages)
noise requirements.
Power Good Monitoring
The APW7138 is equipped with accurate over-current,
Fault Identification by PGOOD Pull-Down
output under-voltage, and over-voltage protections per-
Resistance
fect for NB application. A Power-On-Reset function moni-
70% Under-Voltage Protection (UVP)
tors the voltage on VCC pin to prevent errorneous opera-
124% Over-Voltage Protection (OVP)
tion during power-on. The APW7138 has a digital soft-
Adjustable Over-Current Protection (OCP)
start and soft-stop. The internal integrated soft-start ramps
- Sensing Low-Side MOSFET’s Current
up the output voltage with controlled slew rate to reduce
Over-Temperature Protection (OTP)
the start-up current. The digital soft-stop function actively
SSOP-16, Compact 4mmx4mm QFN-16 (QFN4x4- discharges the output capacitors with controlled reverse
16A), and TQFN3x3-16 Packages
Lead Free and Green Devices Available
inductor current.
The APW7138 is available in SSOP-16, QFN4x4-16A, and
(RoHS Compliant)
TQFN3x3-16 packages.
Applications
Simpilfied Application Circuit
PCI Express Graphical Processing Unit
Notebook Adapter
Auxiliary Power Rail
VRM
FCCM
(Only QFN)
VCC=5V EN
APW7138
RFSET
VIN
+3V~25V
Q1
L
VOUT
Q2
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. A.5 - Jul., 2010
1
www.anpec.com.tw

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APW7138 equivalent
APW7138
Electrical Characteristics (Cont.)
Refer to the typical application circuits. These specifications apply over VCC=5V, VIN=7~25V and TA= -40 ~ 85 °C, unless
otherwise specified. Typical values are at TA=25°C.
Symbol
Parameter
Test Conditions
APW7138
Min. Typ. Max.
Unit
MOSFET GATE DRIVERS (CONT.)
LG Pull-Up Resistance
VPVCC=5V, ILG=0.1A
- 1 2
LG Source Current
LG Sink Resistance
VPVCC=5V, VLG-VPGND=2.5V
VPVCC=5V, ILG=0.1A
-2-A
-
0.6 1.2
LG Sink Current
VPVCC=5V, VLG-VPGND=2.5V
-3-A
TD Dead Time
- 20 - ns
BOOTSTRAP DIODE
VF Forward Voltage
VPVCC-VBOOT-GND=5V, IF=2mA
- 0.8 -
V
IR Reverse Leakage
CONTROL INPUTS
VR=25V
- 0.2 - µA
VFCCMTHR
VFCCMTHF
FCCM High Threshold
FCCM Low Threshold
Only for QFN4x4-16A and
TQFN3x3-16 packages
2.0 -
-V
- - 0.8 V
VENR EN High Threshold
2.0 -
-V
VENF EN Low Threshold
- - 0.8 V
EN Leakage
VEN=5V
- 0.1 1.0 µA
PROTECTION
IOC ISEN OCP Threshold
ISEN Sourcing
20 26 30 µA
ISC ISEN Short-Circuit Threshold
ISEN Sourcing
- 50 - µA
VUV UVP Threshold
UVP Debounce Interval
65 70 75 %
- 2 - µs
VOVR OVP Rising Threshold
119 124 129
%
VOVF OVP Falling Threshold
99 104 109 %
TOTR
OVP Debounce Interval
OTP Rising Threshold (Note 3)
OTP Hysteresis (Note 3)
-2-
- 150 -
- 25 -
µs
oC
oC
Note 3: Guaranteed by design.
Copyright © ANPEC Electronics Corp.
Rev. A.5 - Jul., 2010
5
www.anpec.com.tw


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