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| 型号： | MAX1700EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BST SYNC ADJ 0.8A 16QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.2 V ~ 5.5 V |
| 输入电压： | 0.7 V ~ 5.5 V |
| 频率 - 开关： | 300kHz |
| 电流 - 输出： | 800mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-QSOP |
1-Cell to 3-Cell, High-Power (1A),
Low-Noise, Step-Up DC-DC Converters
OUT
IC PWR
UNDERVOLTAGE LOCKOUT
2.25V
PFM/PWM
CONTROLLER
POUT
START-UP
EN OSCILLATOR
Q
D
Q
PCH
0.25 ?
ONA
ON
RDY
EN
LX
ONB
REF
GND
CLK/SEL
1.25V
REFERENCE
REF
FEEDBACK AND
FEEDBACK
EN
OSCILLATOR
300kHz
PFM/PWM
OSC
MODE
FB
Q
NCH
0.13 ?
PGND
POK*
FB
POWER-GOOD
AIN*
SELECT
REF
GAIN
BLOCK
N
N
AO*
LBP*
COMPARATOR
LBO*
N
LBN*
*MAX1701 ONLY
Figure 1. Functional Diagram
_______________Detailed Description
The MAX1700/MAX1701 are highly efficient, low-noise
power supplies for portable RF and data acquisition
instruments. The MAX1700 combines a boost switching
regulator, N-channel power MOSFET, P-channel syn-
chronous rectifier, precision reference, and shutdown
control. The MAX1701 contains all of the MAX1700 fea-
tures plus a versatile gain amplifier, POK output, and a
low-battery comparator (Figure 1). The MAX1700/
MAX1701 come in a 16-pin QSOP package, which
occupies no more space than an 8-pin SO.
The switching DC-DC converter boosts a 1- to 3-cell
input to an adjustable output between 2.5V and 5.5V.
The MAX1700/MAX1701 start from a low 1.1V input and
remain operational down to 0.7V.
These devices are optimized for use in cellular phones
and other applications requiring low noise during full-
power operation, as well as low-quiescent current for
maximum battery life during standby and shutdown
modes. They feature constant-frequency (300kHz), low-
noise PWM operation with up to 800mA output capabili-
ty. See Table 1 for typical available output current. A
low-quiescent-current, low-power mode offers an out-
put up to 100mA and reduces quiescent power con-
sumption to 200μW. In shutdown mode, the quiescent
current is further reduced to just 3μA. Figure 2 shows
the standard application circuit for the
MAX1700/MAX1701.
Additional features include synchronous rectification for
high efficiency and improved battery life, a POK output,
and an uncommitted comparator for low-battery detec-
tion (MAX1701). A CLK input allows frequency synchro-
nization to reduce interference. Dual shutdown controls
allow shutdown using a momentary pushbutton switch
and microprocessor control (MAX1701).
_______________________________________________________________________________________
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