参数资料
型号: XC9235A15DMR-G
厂商: Torex Semiconductor Ltd
文件页数: 1/34页
文件大小: 0K
描述: IC REG BUCK SYNC 1.5V .6A SOT-25
产品培训模块: XC9235-9236 Overview
特色产品: XC9235 and XC9236 Series of Step-Down DC/DC Converters
标准包装: 1
类型: 降压(降压)
输出类型: 固定
输出数: 1
输出电压: 1.5V
输入电压: 2 V ~ 6 V
频率 - 开关: 3MHz
电流 - 输出: 600mA
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: SC-74A,SOT-753
包装: 标准包装
供应商设备封装: SOT-25
产品目录页面: 1439 (CN2011-ZH PDF)
其它名称: 893-1112-6
XC9235/XC9236/XC9237 Series
ETR0514-014
■ GENERAL DESCRIPTION
600mA Driver Tr. Built-In, Synchronous Step-Down DC/DC Converters
☆ GreenOperation Compatible
The XC9235/XC9236/XC9237 series is a group of synchronous-rectification type DC/DC converters with a built-in 0.42 Ω
P-channel MOS driver transistor and 0.52 Ω N-channel MOS switching transistor, designed to allow the use of ceramic
capacitors. Operating voltage range is from 2.0V to 6.0V (A ~ C types), 1.8V to 6.0V (D ~ G types). For the D/F types which
have a reference voltage of 0.8V (accuracy: ± 2.0%), the output voltage can be set from 0.9V by using two external resistors.
The A/B/C/E/G types have a fixed output voltage from 0.8V to 4.0V in increments of 0.05V (accuracy: ± 2.0%). The device
provides a high efficiency, stable power supply with an output current of 600mA to be configured using only a coil and two
capacitors connected externally. With the built-in oscillator, either 1.2MHz or 3.0MHz can be selected for suiting to your
particular application. As for operation mode, the XC9235 series is PWM control, the XC9236 series is automatic PWM/PFM
switching control and the XC9237 series can be manually switched between the PWM control mode and the automatic
PWM/PFM switching control mode, allowing fast response, low ripple and high efficiency over the full range of loads (from light
load to heavy load).
The soft start and current control functions are internally optimized. During stand-by, all circuits are shutdown to reduce current
consumption to as low as 1.0 μ A or less. The B/F/G types have a high speed soft-start as fast as 0.25ms in typical for quick
turn-on. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel MOS driver transistor is forced OFF
when input voltage becomes 1.4V or lower.
The B to G types integrate C L discharge function which enables the electric charge at the output capacitor C L to be discharged
via the internal discharge switch located between the L X and V SS pins. When the devices enter stand-by mode, output voltage
quickly returns to the V SS level as a result of this function.
Four types of package SOT-25, USP-6C, USP-6EL and WLP-5-03 are available.
■ APPLICATIONS
● Smart phones / Mobile phones
■ FEATURES
Driver Transistor Built-In
: 0.42 Ω P-ch driver transistor
● Bluetooth
● Mobile devices / terminals
● Portable game consoles
● Digital still cameras / Camcorders
● Note PCs / Tablet PCs
0.52 Ω N-ch switch transistor
Input Voltage : 2.0V ~ 6.0V (A/B/C types)
1.8V ~ 6.0V (D/E/F/G types)
Output Voltage : 0.8V ~ 4.0V (Internally set)
0.9V ~ 6.0V (Externally set)
High Efficiency : 92% (TYP.)*
Output Current : 600mA
Oscillation Frequency : 1.2MHz, 3.0MHz (+15%)
Maximum Duty Cycle : 100%
Control Methods : PWM (XC9235)
PWM/PFM Auto (XC9236)
■ TYPICAL APPLICATION CIRCUIT
Function
PWM/PFM Manual (XC9237)
: Current Limiter Circuit Built-In
(Constant Current & Latching)
● XC9235/XC9236/XC9237
A/B/C/E/G types (Output Voltage Fixed)
Capacitor
Operating Ambient Temperature
Packages
Environmentally Friendly
C L Discharge (B/C/D/E/F/G types)
High Speed Soft Start (B/F/G type)
: Low ESR Ceramic Capacitor
:-40 ℃ ~ +85 ℃
: SOT-25 (A/B/C types only)
USP-6C
USP-6EL(A/B/C types only)
WLP-5-03(A/B types only)
: EU RoHS Compliant, Pb Free
* Performance depends on external components and wiring on the PCB.
■ TYPICAL PERFORMANCE CHARACTERISTICS
● XC9235/XC9236/XC9237
● Efficiency vs. Output Current ( f OSC =1.2MHz, V OUT =1.8V )
D/F types (Output Voltage Externally Set)
100
90
80
70
PWM/PFM Automatic Sw itching Control
VIN= 4.2V
60
50
40
30
20
10
0
3.6V
2.4V
PWM Control
VIN= 4.2V
3.6V
2.4V
0.1
1
10
100
1000
Output Current:IOUT(mA)
1/34
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