NJM2891
2ch LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION The NJM2891 is low dropout voltage regulator designed for cellular phone application. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. FEATURES High Ripple Rejection 70dB typ. (f=1kHz , Vo=3V Version) Output Noise Voltage Vno=30µVrms typ.(Cp=0.01µF) Output capacitor with 1.0µF ceramic capacitor (Vo≥2.7V) Output Current Io(max.)=150mA × 2ch High Precision Output Vo±1.0% Low Dropout Voltage 0.10V typ. (Io=60mA) ON/OFF Control (Active High) Internal Short Circuit Current Limit Internal Thermal Overload Protection Bipolar Technology Package Outline FFP12-B1 (2.0×2.0×0.85mm) PIN CONFIGURATION PIN FUNCTION 1. VOUT2 2. VOUT2 3. GND 4. CONTROL2 5. VIN2 6. VIN1 PACKAGE OUTLINE
NJM2891PB1
9 10 11 12 1
8
7 6 5 4 6 5 4
7
8
9 10 11 12
7. CONTROL1 8. VOUT1 9. VOUT1 10. NOISE BYPASS1 11. NC 12. NOISE BYPASS2
2
3
3
2
1
TOP
BOTTOM
NJM2891PB1 EQUIVALENT CIRCUIT
VIN1/ VIN2 Cont1/Cont2
Thermal Protection Bandgap Reference Noise Bypass1 / Noise Bypass2
VOUT1/ VOUT2
GND
NJM2891
(Ta=25°C) RATINGS UNIT +14 V +14(*1) V 300(*2) mW −40 ∼ +85 °C −40 ∼ +125 °C (*1):When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage. (*2):On board. (25mm×25mm×0.2mm) ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Control Voltage VCONT Power Dissipation PD Operating Temperature Topr Storage Temperature Tstg Operating Voltage VIN=+2.5V ∼ +14.0V (In case of Vo
