ILC7280 Datasheet, PDF (1/9 Pages) Impala Linear Corporation – MICROPOWER DUAL 150MA CMOS RF LDO REGULATORS WITH 75DB RIPPLE REJECTION

Impala Linear Corporation
ILC7280 ^Advance
Micropower Dual 150mA CMOS RF LDO™ Regulators
with 75dB Ripple Rejection
General Description
Features
The ILC7280 is two independent 150mA low dropout (LDO)
voltage regulators in an 8-pin MSOP package. Each regu-
lator output is independently short circuit protected and has
independent enable lines. The device offers a unique com-
bination of low dropout voltage and low quiescent current of
CMOS as well as the low noise and high ripple rejection
characteristics of bipolar LDO regulators. Moreover, only
one input capacitor is required.
Dropout Voltage: Typically 150mV at 150mA load, and
1mV at 1mA load.
Ground pin current: Typically 130µA at 1mA load, and
135µA at 150mA load.
Ripple Rejection: 55dB at 1kHz and 60dB at 100kHz.
Shutdown mode: Less than 0.5µA quiescent current in
shutdown mode.
Small package: MSOP-8
Small capacitor: Requires only a 0.47µF external capacitor
on the regulator output.
Precision output: Output voltage trimmed to 1% accuracy.
Output Noise: 80µV_RMS, optional noise bypass capacitor
at pin 3 will further reduce noise on V_OUTA/B
Voltage Pairings available: 3.0/3.0V, 3.0/2.8V, 3.0/2.5V,
2.8/2.8V
• Guaranteed 150mA output per regulator
• Ultra low 150mV dropout at 150mA
• 1% output voltage accuracy
• Requires only 0.47µF output capacitor
• Only 150µA ground current at 150mA load
• 60dB ripple rejection at 1kHz (C_OUT = 0.47µF)
• 80µV_RMS noise at BW = 300Hz to 50kHz
• Excellent line and load transient response
• Over current / over temperature protection
• 8-pin MSOP package
• -60dB cross talk
Applications
• Cellular Phones, pagers and wireless headsets
• Palmtops, organizers, PDAs and portable electronics
• Battery powered portable appliances and equipment
• Remote data accumulation and instrumentation
Ordering Information* (T_A = -40°C to +85°C)
ILC7280CS-2530
ILC7280CS-3028
ILC7280CS-2828
ILC7280CS-3030
ILC7280CS-3025
150mA 2.5V and 3.0V LDO regulators
150mA 3.0V and 2.8V LDO regulators
150mA 2.8V and 2.8V LDO regulators
150mA 3.0V and 3.0V LDO regulators
150mA 3.0V and 2.5V LDO regulators
Figure 1: Typical Application
Note: Enable may be connected to V_IN,
C_NOISE is common to both LDOs
Impala Linear Corporation
ILC7280 1.8
V_OUTA
0.47-2.2µF ⁺
ceramic
V_OUTB
0.47-2.2µF ⁺
ceramic
GND
C_NOISE
22pF
(optional)
[phone] www.impalalinear.com
EN_A
V_INB
EN_B
1µF
ceramic
V_INA
+
+
4.7µF
May 2000 1