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参数资料
| 型号： | MAX5073ETI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/25页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BST ADJ 1A/2A 28TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 28 V |
| 输入电压： | 4.5 V ~ 23 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 200kHz ~ 2.2MHz |
| 电流 - 输出： | 1A，2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
2.2MHz, Dual-Output Buck or Boost Converter
with Internal Power MOSFETs
Typical Operating Characteristics (continued)
(V+ = VL = 5.2V, T A = +25°C, unless otherwise noted.)
3.00
OUTPUT LOAD CURRENT LIMIT
vs. TEMPERATURE
FOUR-PHASE OPERATION
(SEE FIGURE 3)
MAX5073 toc22
2.75
2.50
2.25
2.00
1.75
1.50
OUTPUT1
OUTPUT2
V IN = 5.5V
f SW = 2.2MHz
SOURCE1
(MASTER)
0V
SOURCE2
(MASTER)
0V
SOURCE1
(SLAVE)
0V
1.25
SOURCE2
1.00
(SLAVE)
-40
-5
30
65
100
TEMPERATURE ( ° C)
400ns/div
Pin Description
PIN
1
2
3, 4
5
6
7
8
9
NAME
CLKOUT
BST2/VDD2
DRAIN2
EN2
FB2
COMP2
SYNC
N.C.
FUNCTION
Clock Output. CLKOUT is 45° phase-shifted with respect to converter 2 (SOURCE2, Figure 3). Connect
CLKOUT (master) to the SYNC of a second MAX5073 (slave) for a four-phase converter.
Buck Converter Operation—Bootstrap Flying-Capacitor Connection for Converter 2. Connect BST2/VDD2
to an external ceramic capacitor and diode according to the standard application circuit (Figure 1).
Boost Converter Operation—Driver Bypass Capacitor Connection. Connect a low-ESR 0.1μF ceramic
capacitor from BST2/VDD2 to PGND (Figure 8).
Connection to Converter 2 Internal MOSFET Drain. Buck converter operation—use the MOSFET as a
high-side switch and connect DRAIN2 to the input supply. Boost converter operation—use the MOSFET
as a low-side switch and connect DRAIN2 to the inductor and diode junction (Figure 8).
Active-High Enable Input for Converter 2. Drive EN2 low to shut down converter 2, drive EN2 high for normal
operation. Use EN2 in conjunction with EN1 for supply sequencing. Connect to VL for always-on operation.
Feedback Input for Converter 2. Connect FB2 to a resistive divider between converter 2’s output and SGND
to adjust the output voltage. To set the output voltage below 0.8V, connect FB2 to a resistive voltage-divider
from BYPASS to regulator 2’s output (Figure 5). See the Setting the Output Voltage section.
Compensation Connection for Converter 2. See the Compensation section to compensate converter 2’s
control loop.
External Clock Synchronization Input. Connect SYNC to a 400kHz to 4400kHz clock to synchronize the
switching frequency with the system clock. Each converter frequency is one half the frequency applied to
SYNC. Connect SYNC to SGND when not used.
No Connection. Not internally connected.
8
_______________________________________________________________________________________
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