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参数资料
| 型号： | MAX668EUB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/18页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM HYBRID 10-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式，混合 |
| 输出数： | 1 |
| 频率 - 最大： | 575kHz |
| 占空比： | 94% |
| 电源电压： | 3 V ~ 28 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
MAX668/MAX669
1.8V to 28V Input, PWM Step-Up
Controllers in μMAX
ABSOLUTE MAXIMUM RATINGS
V CC to GND ..........................................................-0.3V to +30V
PGND to GND....................................................................±0.3V
SYNC/ SHDN to GND .............................................-0.3V to +30V
EXT, REF to GND.....................................-0.3V to (V LDO + 0.3V)
LDO, FREQ, FB, CS+ to GND ................................ -0.3V to +6V
LDO Output Current...........................................-1mA to +20mA
REF Output Current..............................................-1mA to +1mA
LDO Short Circuit to GND .........................................Momentary
REF Short Circuit to GND ..........................................Continuous
Continuous Power Dissipation (T A = +70°C)
10-Pin μMAX (derate 5.6mW/°C above +70°C) ............444mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering,10sec) ..............................+300°C
Soldering Temperature (Reflow) ......................................+300°C
Lead(Pb)-Free Packages..............................................+260°C
Packages Containing Lead(Pb)....................................+240°C
ELECTRICAL CHARACTERISTICS
(V CC = V LDO = +5V, R OSC = 200k ? , T A = 0°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Controller
PWM CONTROLLER
Input Voltage Range, V CC
Input Voltage Range with V CC Tied to LDO
MAX668
MAX669
3
1.8
2.7
28
28
5.5
V
V
FB Threshold
1.225
1.250
1.275
V
Typically 0.013% per mV on CS+;
FB Threshold Load Regulation
V CS + range is 0 to 100mV for 0 to full
0.013
%/mV
load current.
Typically 0.012% per % duty factor on
FB Threshold Line Regulation
EXT; EXT duty factor for a step-up is:
0.012
%/%
100% (1 – V IN /V OUT )
FB Input Current
Current Limit Threshold
Idle Mode Current-Sense Threshold
CS+ Input Current
V CC Supply Current (Note 1)
Shutdown Supply Current (V CC )
V FB = 1.30V
CS+ forced to GND
V FB = 1.30V, V CC = 3V to 28V
SYNC/ SHDN = GND, V CC = 28V
85
5
1
100
15
0.2
220
3.5
20
115
25
1
350
6
nA
mV
mV
μA
μA
μA
Reference and LDO LDO Regulators
REFERENCE AND REGULATORS
LDO Output Voltage
LDO load =
∞ to 400 ?
5V ≤ V CC ≤ 28V
(includes LDO dropout)
3V ≤ V CC ≤ 28V
(includes LDO dropout)
4.50
2.65
5.00
5.50
5.50
V
Undervoltage Lockout Threshold
REF Output Voltage
REF Load Regulation
REF Undervoltage Lockout Threshold
Sensed at LDO, falling edge,
hysteresis = 1%, MAX668 only
No load, C REF = 0.22μF
REF load = 0 to 50μA
Rising edge, 1% hysteresis
2.40
1.225
1.0
2.50
1.250
-2
1.1
2.60
1.275
-10
1.2
V
V
mV
V
Oscillator
OSCILLATOR
R OSC = 200k ? ±1%
225
250
275
Oscillator Frequency
R OSC = 100k ? ±1%
R OSC = 500k ? ±1%
425
85
500
100
575
115
kHz
2
Maxim Integrated
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